Calendar

We are seeking two volunteer Preserve Stewards each Wednesday, Thursday, Friday, Saturday and Sunday in spring to support operations at MOCR. These volunteers will provide public engagement support in the gateway property using the welcome booth, b...

We are seeking three volunteer Preserve Stewards each Wednesday, Thursday, and Friday (in addition to Open Access Days, April 19 & April 26) in spring to support operations at MOCR. These volunteers will perform patrols in the Habitat Protection Zon...

We are seeking three volunteer Preserve Stewards each Wednesday, Thursday, and Friday (in addition to Open Access Days, April 19 & April 26) in spring to support operations at MOCR. These volunteers will perform patrols in the Habitat Protection Zon...

We are seeking two volunteer Preserve Stewards each Wednesday, Thursday, Friday, Saturday and Sunday in spring to support operations at MOCR. These volunteers will provide public engagement support in the gateway property using the welcome booth, b...

We are seeking three volunteer Preserve Stewards each Wednesday, Thursday, and Friday (in addition to Open Access Days, April 19 & April 26) in spring to support operations at MOCR. These volunteers will perform patrols in the Habitat Protection Zon...

We are seeking 2 enthusiastic volunteers to join a VET's team staff member at the City of Santa Clara's annual Arbor Day celebration! The celebration is scheduled for Thursday, April 2, 2026 from 10:00 AM until 2:00 PM at the Triton Museum of Ar...

TM Volunteer support request for weed eating work in Rancho Cañada del Oro Open Space Preserve.Lead OST 2 Greg Rosselli and the field team are breaking off the entire Bald Peaks Trail as a Trail Master led effort. We are requesting Trail Master supp...

We are seeking two volunteer Preserve Stewards each Wednesday, Thursday, Friday, Saturday and Sunday in spring to support operations at MOCR. These volunteers will provide public engagement support in the gateway property using the welcome booth, b...

We are seeking three volunteer Preserve Stewards each Wednesday, Thursday, and Friday (in addition to Open Access Days, April 19 & April 26) in spring to support operations at MOCR. These volunteers will perform patrols in the Habitat Protection Zon...

We are seeking three volunteer Preserve Stewards each Wednesday, Thursday, and Friday (in addition to Open Access Days, April 19 & April 26) in spring to support operations at MOCR. These volunteers will perform patrols in the Habitat Protection Zon...

We are seeking two volunteer Preserve Stewards each Wednesday, Thursday, Friday, Saturday and Sunday in spring to support operations at MOCR. These volunteers will provide public engagement support in the gateway property using the welcome booth, b...

We are seeking three volunteer Preserve Stewards each Wednesday, Thursday, and Friday (in addition to Open Access Days, April 19 & April 26) in spring to support operations at MOCR. These volunteers will perform patrols in the Habitat Protection Zon...

We are seeking three volunteer Preserve Stewards each Wednesday, Thursday, and Friday (in addition to Open Access Days, April 19 & April 26) in spring to support operations at MOCR. These volunteers will perform patrols in the Habitat Protection Zon...

We are seeking two volunteer Preserve Stewards each Wednesday, Thursday, Friday, Saturday and Sunday in spring to support operations at MOCR. These volunteers will provide public engagement support in the gateway property using the welcome booth, b...

We are seeking three volunteer Preserve Stewards each Wednesday, Thursday, and Friday (in addition to Open Access Days, April 19 & April 26) in spring to support operations at MOCR. These volunteers will perform patrols in the Habitat Protection Zon...

We are seeking five volunteer ambassadors to help represent us by walking in the 2026 Bunnies and Bonnets Parade in Campbell on Saturday April 4, 2026. The parade begins at noon on Campbell Avenue. It travels from the VTA Light Rail tracks down Campb...

TM Volunteer support request for weed eating work in Rancho Cañada del Oro Open Space Preserve.Lead OST 2 Greg Rosselli and the field team are breaking off the entire Bald Peaks Trail as a Trail Master led effort. We are requesting Trail Master supp...

We are seeking two volunteer Preserve Stewards each Wednesday, Thursday, Friday, Saturday and Sunday in spring to support operations at MOCR. These volunteers will provide public engagement support in the gateway property using the welcome booth, b...

Habitat Protection Hikes at Máyyan ‘Ooyákma - Coyote Ridge Open Space Preserve- Hike Sweeps Needed! Please note that shifts for April 11 and 12 have been canceled due to inclement weatherTo help protect this sensitive and unique ecosystem, in Mar...

Habitat Protection Hikes at Máyyan 'Ooyákma! Please note that April 11 and 12 Hikes have been canceled due to inclement weatherTo help protect this sensitive and unique ecosystem, in March, April, and May the trails will be open by reservation ON...

Karen will lead this hikeProgram will run from 8:15 AM - 12:00 PM, and the group will begin arriving at 8:00 AM. Please arrive at least 15 min prior to 8 a.m. so that you can help get the group parked and gathered. Sweeps keep the group together and...

We are seeking two volunteer Preserve Stewards each Wednesday, Thursday, Friday, Saturday and Sunday in spring to support operations at MOCR. These volunteers will provide public engagement support in the gateway property using the welcome booth, b...

Habitat Protection Hikes at Máyyan ‘Ooyákma - Coyote Ridge Open Space Preserve- Hike Sweeps Needed! Please note that shifts for April 11 and 12 have been canceled due to inclement weatherTo help protect this sensitive and unique ecosystem, in Mar...

Habitat Protection Hikes at Máyyan 'Ooyákma! Please note that April 11 and 12 Hikes have been canceled due to inclement weatherTo help protect this sensitive and unique ecosystem, in March, April, and May the trails will be open by reservation ON...

We are seeking two volunteer Preserve Stewards each Wednesday, Thursday, Friday, Saturday and Sunday in spring to support operations at MOCR. These volunteers will provide public engagement support in the gateway property using the welcome booth, b...

TM Volunteer support request for this day of weed eating at Blair Barn. Please arrive no later than 9:00 a.m. and park at the Barn. BONUS: Wildflowers are still a distinct possibility as the Blair Barn is a seasonal treat. The turn off of Uvas Rd on...

We are seeking two volunteer Preserve Stewards each Wednesday, Thursday, Friday, Saturday and Sunday in spring to support operations at MOCR. These volunteers will provide public engagement support in the gateway property using the welcome booth, b...

We are seeking three volunteer Preserve Stewards each Wednesday, Thursday, and Friday (in addition to Open Access Days, April 19 & April 26) in spring to support operations at MOCR. These volunteers will perform patrols in the Habitat Protection Zon...

We are seeking three volunteer Preserve Stewards each Wednesday, Thursday, and Friday (in addition to Open Access Days, April 19 & April 26) in spring to support operations at MOCR. These volunteers will perform patrols in the Habitat Protection Zon...

We are seeking two volunteer Preserve Stewards each Wednesday, Thursday, Friday, Saturday and Sunday in spring to support operations at MOCR. These volunteers will provide public engagement support in the gateway property using the welcome booth, b...

We are seeking two volunteer Preserve Stewards each Wednesday, Thursday, Friday, Saturday and Sunday in spring to support operations at MOCR. These volunteers will provide public engagement support in the gateway property using the welcome booth, b...

We are seeking three volunteer Preserve Stewards each Wednesday, Thursday, and Friday (in addition to Open Access Days, April 19 & April 26) in spring to support operations at MOCR. These volunteers will perform patrols in the Habitat Protection Zon...

We are seeking three volunteer Preserve Stewards each Wednesday, Thursday, and Friday (in addition to Open Access Days, April 19 & April 26) in spring to support operations at MOCR. These volunteers will perform patrols in the Habitat Protection Zon...

We are seeking two volunteer Preserve Stewards each Wednesday, Thursday, Friday, Saturday and Sunday in spring to support operations at MOCR. These volunteers will provide public engagement support in the gateway property using the welcome booth, b...

We are seeking three volunteer Preserve Stewards each Wednesday, Thursday, and Friday (in addition to Open Access Days, April 19 & April 26) in spring to support operations at MOCR. These volunteers will perform patrols in the Habitat Protection Zon...

We are seeking three volunteer Preserve Stewards each Wednesday, Thursday, and Friday (in addition to Open Access Days, April 19 & April 26) in spring to support operations at MOCR. These volunteers will perform patrols in the Habitat Protection Zon...

We are seeking three volunteer Preserve Stewards each Wednesday, Thursday, and Friday (in addition to Open Access Days, April 19 & April 26) in spring to support operations at MOCR. These volunteers will perform patrols in the Habitat Protection Zon...

We are seeking three volunteer Preserve Stewards each Wednesday, Thursday, and Friday (in addition to Open Access Days, April 19 & April 26) in spring to support operations at MOCR. These volunteers will perform patrols in the Habitat Protection Zon...

We are seeking 3 docents to lead the Coyote Valley Discovery Day HikeSign up if you are interested, we will send you the lesson for review! The content is very thorough, and we would like to have a small group lead so more folks can be trained to lea...

We are seeking 3 docents to lead the Coyote Valley Discovery Day HikeSign up if you are interested, we will send you the lesson for review! The content is very thorough, and we would like to have a small group lead so more folks can be trained to lea...

Join us for a brief training on the set-up and protocols for Starry Nights for Preserve StewardsWe are hosting a brief training for Starry Nights Preserve Stewards (or aspiring Starry Nights Preserve Stewards) in order to get everyone on the same pag...

We are seeking two enthusiastic volunteers to join OSA VET's team staff member at the Spring Garden Fair at Martial Cottle Park. This event is scheduled for Saturday, April 11, 2026 from 9:00 AM until 2:00 PM. Shifts are 8:30am to 12:00pm and 11...

We are seeking two enthusiastic volunteers to join OSA VET's team staff member at the Spring Garden Fair at Martial Cottle Park. This event is scheduled for Saturday, April 11, 2026 from 9:00 AM until 2:00 PM. Shifts are 8:30am to 12:00pm and 11...

We're seeking 5 volunteers to help with Starry Nights each month in 2026! ⭐The BasicsVolunteer shift date & time: Varies - specific times shown in YELLOW belowProgram Time: Varies - shown below in whiteNote: the program run time is NOT the vol...

This is a No Worries Amigos Hike- and it will officially start at 6 p.m. and end at 10 p.m.  As a sweep, your job will be to keep the group together and answer questions about OSA as well as help close/lock up when the hike is finished.  There is a...

Ed Rooks is leading.  He needs at least 1 sweep to help with the walk. 

We are seeking two volunteer Preserve Stewards each Wednesday, Thursday, Friday, Saturday and Sunday in spring to support operations at MOCR. These volunteers will provide public engagement support in the gateway property using the welcome booth, b...

We are seeking three volunteer Preserve Stewards each Wednesday, Thursday, and Friday (in addition to Open Access Days, April 19 & April 26) in spring to support operations at MOCR. These volunteers will perform patrols in the Habitat Protection Zon...

We are seeking three volunteer Preserve Stewards each Wednesday, Thursday, and Friday (in addition to Open Access Days, April 19 & April 26) in spring to support operations at MOCR. These volunteers will perform patrols in the Habitat Protection Zon...

TM Volunteer support request for this day of invasive species maintenance. There are 10 native planting areas within a larger enclosure along ¾ miles of Fisher's Creek at the Kuzia property's restoration site, shown below. To maintain the site OS...

We are seeking two volunteer Preserve Stewards each Wednesday, Thursday, Friday, Saturday and Sunday in spring to support operations at MOCR. These volunteers will provide public engagement support in the gateway property using the welcome booth, b...

We are seeking three volunteer Preserve Stewards each Wednesday, Thursday, and Friday (in addition to Open Access Days, April 19 & April 26) in spring to support operations at MOCR. These volunteers will perform patrols in the Habitat Protection Zon...

We are seeking three volunteer Preserve Stewards each Wednesday, Thursday, and Friday (in addition to Open Access Days, April 19 & April 26) in spring to support operations at MOCR. These volunteers will perform patrols in the Habitat Protection Zon...

We are seeking two volunteer Preserve Stewards each Wednesday, Thursday, Friday, Saturday and Sunday in spring to support operations at MOCR. These volunteers will provide public engagement support in the gateway property using the welcome booth, b...

We would like to have 2 volunteers to come help with this easy casual walk at Little Uvas. Please plan to arrive a little bit early so that you can help people park and close the gate. Plan to bring your volunteer uniform, a light source, food, water...

We are seeking two volunteer Preserve Stewards each Wednesday, Thursday, Friday, Saturday and Sunday in spring to support operations at MOCR. These volunteers will provide public engagement support in the gateway property using the welcome booth, b...

We are seeking three volunteer Preserve Stewards each Wednesday, Thursday, and Friday (in addition to Open Access Days, April 19 & April 26) in spring to support operations at MOCR. These volunteers will perform patrols in the Habitat Protection Zon...

We are seeking three volunteer Preserve Stewards each Wednesday, Thursday, and Friday (in addition to Open Access Days, April 19 & April 26) in spring to support operations at MOCR. These volunteers will perform patrols in the Habitat Protection Zon...

We are seeking two volunteer Preserve Stewards each Wednesday, Thursday, Friday, Saturday and Sunday in spring to support operations at MOCR. These volunteers will provide public engagement support in the gateway property using the welcome booth, b...

TM Volunteer support request for this day of invasive species maintenance. There are 10 native planting areas within a larger enclosure along ¾ miles of Fisher's Creek at the Kuzia property's restoration site, shown below. To maintain the site OS...

We are seeking an enthusiastic volunteer to represent our team alongside OSA staff at the City of Milpitas annual Earth Day celebration! This year, we will be hosting an exciting presentation for the public on our recent work on the American Badge...

We are seeking two volunteer Preserve Stewards each Wednesday, Thursday, Friday, Saturday and Sunday in spring to support operations at MOCR. These volunteers will provide public engagement support in the gateway property using the welcome booth, b...

Fresh Air and Flowers at Máyyan ‘Ooyákma - Coyote Ridge Open Space Preserve- Hike Sweeps Needed!Please note shifts are listed below. Shifts for April 11 have been cancelled due to inclement weatherTo help protect this sensitive and unique ecosy...

Fresh Air and Flowers Hikes at Máyyan 'Ooyákma! Please note that shifts for April 11 have been canceled due to inclement weatherTo help protect this sensitive and unique ecosystem, in March, April, and May the trails will be open by reservation O...

We are seeking two enthusiastic volunteers to join an OSA VET's team staff member at the Celebrate Earth Day at Santana Row event! This event is scheduled for Sunday, April 19, 2026 from 11:00 AM until 3:00 PM at Santana Row. Volunteer shift is ...

Help us engage our communities at Viva Calle SJ which is an open streets program that connects communities by temporarily closing streets to motorized vehicles allowing for non-motorized activities like walking, running and skating!Among other things...

We are seeking 3-4 docents to come help us with an exciting Earth Day event that we will be hosting at Santana Row! We will be engaging our neighbors with a wide suite of activities including tables from CVCAMP and partners, face-painting, live music...

We are seeking two enthusiastic volunteers to join a OSA VET's team staff member at the Celebrate Santa Clara STEM Zone event! This event is scheduled for Sunday, April 19, 2026 from 10:00 AM until 4:00 PM at the Santa Clara Convention Center. ...

We are seeking two volunteer Preserve Stewards each Wednesday, Thursday, Friday, Saturday and Sunday in spring to support operations at MOCR. These volunteers will provide public engagement support in the gateway property using the welcome booth, b...

We are seeking one enthusiastic volunteers to join a VET's team staff member at the SJ Kaiser Earth Day celebration!  The celebration is scheduled for Tuesday, April 21, 2026 from 10:00 AM until 2:30 PM at the Kaiser Permanente San Jose Medical ...

We are seeking two volunteer Preserve Stewards each Wednesday, Thursday, Friday, Saturday and Sunday in spring to support operations at MOCR. These volunteers will provide public engagement support in the gateway property using the welcome booth, b...

We are seeking three volunteer Preserve Stewards each Wednesday, Thursday, and Friday (in addition to Open Access Days, April 19 & April 26) in spring to support operations at MOCR. These volunteers will perform patrols in the Habitat Protection Zon...

We are seeking three volunteer Preserve Stewards each Wednesday, Thursday, and Friday (in addition to Open Access Days, April 19 & April 26) in spring to support operations at MOCR. These volunteers will perform patrols in the Habitat Protection Zon...

We are seeking two volunteer Preserve Stewards each Wednesday, Thursday, Friday, Saturday and Sunday in spring to support operations at MOCR. These volunteers will provide public engagement support in the gateway property using the welcome booth, b...

We are seeking three volunteer Preserve Stewards each Wednesday, Thursday, and Friday (in addition to Open Access Days, April 19 & April 26) in spring to support operations at MOCR. These volunteers will perform patrols in the Habitat Protection Zon...

TM Volunteer support request for this day of weed eating in Sierra Vista OSP. Please arrive no later than 9:00 a.m. and park in the staging area. TM Volunteers will depart from there with staff for the day. Our goal is to weedeat the Aquila Loop, one...

We are seeking one enthusiastic volunteers to join a VET's team staff member at the San Jose State University's Earth Day celebration!  The celebration is scheduled for Thursday, April 23, 2026 from 10:00 AM until 2:00 PM at the SJSU on the Tower ...

We are seeking two volunteer Preserve Stewards each Wednesday, Thursday, Friday, Saturday and Sunday in spring to support operations at MOCR. These volunteers will provide public engagement support in the gateway property using the welcome booth, b...

We are seeking three volunteer Preserve Stewards each Wednesday, Thursday, and Friday (in addition to Open Access Days, April 19 & April 26) in spring to support operations at MOCR. These volunteers will perform patrols in the Habitat Protection Zon...

We are seeking three volunteer Preserve Stewards each Wednesday, Thursday, and Friday (in addition to Open Access Days, April 19 & April 26) in spring to support operations at MOCR. These volunteers will perform patrols in the Habitat Protection Zon...

We are seeking two volunteer Preserve Stewards each Wednesday, Thursday, Friday, Saturday and Sunday in spring to support operations at MOCR. These volunteers will provide public engagement support in the gateway property using the welcome booth, b...

We are seeking three volunteer Preserve Stewards each Wednesday, Thursday, and Friday (in addition to Open Access Days, April 19 & April 26) in spring to support operations at MOCR. These volunteers will perform patrols in the Habitat Protection Zon...

We are seeking three volunteer Preserve Stewards each Wednesday, Thursday, and Friday (in addition to Open Access Days, April 19 & April 26) in spring to support operations at MOCR. These volunteers will perform patrols in the Habitat Protection Zon...

We are seeking two volunteer Preserve Stewards each Wednesday, Thursday, Friday, Saturday and Sunday in spring to support operations at MOCR. These volunteers will provide public engagement support in the gateway property using the welcome booth, b...

We are seeking three volunteer Preserve Stewards each Wednesday, Thursday, and Friday (in addition to Open Access Days, April 19 & April 26) in spring to support operations at MOCR. These volunteers will perform patrols in the Habitat Protection Zon...

TM Volunteer support request for this day of weed eating in Sierra Vista OSP. Please arrive no later than 9:00 a.m. and park in the staging area. TM Volunteers will depart from there with staff for the day. Our goal is to weedeat the Upper Penitencia...

We are seeking two enthusiastic volunteers to join an OSA VET's team staff member at the Celebrate Earth Day event in Morgan Hill. This event is scheduled for Saturday, April 25, 2026 from 9:00 AM until 2:00 PM. Shifts are 8:30am to 12:00pm and...

We are seeking four enthusiastic volunteers to join an OSA VET's team staff member at the California Native Plant Society (CNPS) Wildflower Show! This event is scheduled for Saturday, April 25, 2026 from 9:30 AM until 4:00 PM at West Valley Coll...

We are seeking two volunteer Preserve Stewards each Wednesday, Thursday, Friday, Saturday and Sunday in spring to support operations at MOCR. These volunteers will provide public engagement support in the gateway property using the welcome booth, b...

Habitat Protection Hikes at Máyyan ‘Ooyákma - Coyote Ridge Open Space Preserve- Hike Sweeps Needed! Please note that shifts for April 11 and 12 have been canceled due to inclement weatherTo help protect this sensitive and unique ecosystem, in Mar...

We are seeking two volunteer Preserve Stewards each Wednesday, Thursday, Friday, Saturday and Sunday in spring to support operations at MOCR. These volunteers will provide public engagement support in the gateway property using the welcome booth, b...

We are seeking three volunteer Preserve Stewards each Wednesday, Thursday, and Friday (in addition to Open Access Days, April 19 & April 26) in spring to support operations at MOCR. These volunteers will perform patrols in the Habitat Protection Zon...

We are seeking 3-4 docents to come help us with an exciting Earth Day event that we will be hosting at MOCR. We will be engaging with visitors with games, partner tables, crafts and exploration as a part of our Open Access Day! As a part of the celeb...

We are seeking two volunteer Preserve Stewards each Wednesday, Thursday, Friday, Saturday and Sunday in spring to support operations at MOCR. These volunteers will provide public engagement support in the gateway property using the welcome booth, b...

We are seeking 3-4 docents to come help us with an exciting Earth Day event that we will be hosting at MOCR. We will be engaging with visitors with games, partner tables, crafts and exploration as a part of our Open Access Day! As a part of the celeb...

TM Volunteer support request for this day of weed eating in Sierra Vista OSP. Please arrive no later than 9:00 a.m. and park in the staging area. TM Volunteers will depart from there with staff for the day. The exact location of our work this day has...

TM Volunteer support request for this day of weed eating in Sierra Vista OSP. Please arrive no later than 9:00 a.m. and park in the staging area. TM Volunteers will depart from there with staff for the day. The exact location of our work this day has...