Indian Rock (South Bay) Adopt-A-Crag: Coming Up May 20, 2017!

Join the Bay Area Climbers Coalition in partnership with Sanborn/Santa Clara County Parks department to take on some needed cleaning and maintenance around Indian Rock South Bay.  We will be cleaning up glass and trash, doing trail and rock stair maintenance, and removing graffiti.

Location:  Indian Rock is located in Saratoga.  A full description and detailed directions can be found on its Mountain Project website.  It can be confusing to find when going there the first time, so be sure to check a map before you head out.  Please note that Skyline is currently closed south of Indian Rock and Castle Rock.

We have found the easiest way to get to Indian Rock is the following:

  1. From CA-85, exit Saratoga Ave and head west
  2. Continue on Saratoga Ave; it will become CA State Route 9
  3. Follow CA State Route 9 up the mountain. The first stop sign you get to is CA-35; turn left.
  4. Follow CA-35 for about 2.5 miles.  You will see Castle Rock State Park on your right; go about 100 feet further, and you will see Indian Rock on your left.

Date:  May 20, 2017
Time:  10:00 A.M. – 1:00 P.M.
How To Join:  Sign up on Eventbrite!


Food – Delicious lunch will be provided as well as snacks to keep you fueled for the day!

Water – We will have water available. If you have a water bottle, please feel free to bring it with you.

Tools – We will provide tools and gloves–please be sure to wear long pants and close-toed shoes.

Climbing – The plan is to end the event around 1 pm to allow enough time for everyone to go climbing together!  Indian Rock is one of the premier Bay Area crags with amazing bouldering, top rope, and sport climbs. Many climbers know it as home to some of the best boulder problems in the greater Castle Rock/Sanborn County area. Feel free to bring your own gear for some post-event crushing at Castle Rock State Park, Indian Rock, or another of the many crags in the area.

We greatly appreciate the support from Planet Granite-Sunnyvale and Access Fund for this Adopt-A-Crag!

Glen Park Adopt-A-Crag: Coming Up May 13, 2017!

Join the Bay Area Climbers Coalition to take on some work in beautiful Glen Canyon, nestled in the heart of San Francisco’s world-famous hills! Activities will include cleaning up glass and trash, clearing paths and walkways, trail repair, and graffiti removal.

Location: Glen Canyon Park is located in the Glen Park neighborhood of San Francisco, a pleasant 10 minutes walk on flat ground from the Glen Park BART station. provides a great overview and directions. The park is a popular spot on weekends, so parking can be challenging; carpooling or public transit is recommended if at all possible. We’ll be meeting in the middle of the park, at the northern end of the dirt road that runs alongside Islais Creek, just across from the Silvertree camp / Glen Ridge pre-school building.
Date: May 13, 2017
Time: 10:00 AM to 2:00 PM
How to Join: Sign up on Eventbrite!


Safety – We are HUGE on safety! There will be a safety talk at 10am on the day of the event. Please note that we require all participants to be present for the safety talk and wear closed toe shoes. Unfortunately, we cannot allow anyone to participate that does not wear closed toe shoes and/or attend the safety talk.

Food – Lunch will be provided for all volunteers.

Water – Drinking fountains are available a 5 minute walk down at the bottom end of the canyon (near the Rec Centre), but to save time, please bring a water bottle.

Tools – Tools and gloves will be provided by the San Francisco Recreation & Parks Dept, but feel free to bring your own work gloves if you prefer.

Bathrooms – A porta-potty will be provided by the San Francisco Recreation & Parks Dept near the project areas.  There are also bathrooms down at the Rec Centre; however, since it is currently under renovation, the bathrooms may not be open.

Clothing – Sturdy, closed toe shoes are mandatory.  The canyon can be foggy and windy in the summer months; a windproof jacket is recommended.

We greatly appreciate the support from Access Fund for this Adopt-A-Crag!

Did You Know…
The first dynamite factory in the United States (est. 1868) was based in Glen Canyon (then sparsely populated) right around the current location of the Rec Center.  It exploded in 1869, killing 2 workmen and leveling the facility. It was rebuilt out in what is now the Sunset District (that facility also exploded).

Some older folks remember rafting on Islais Creek (the creek in the bottom of the canyon) during winter and spring.  Apparently, changes in the size and drainage on O’Shaughnessy Blvd and Portola Avenue, as well as the build-out of Miraloma Park (1930s-1950s) and Diamond Heights (1960s) substantially reduced the amount of surface runoff reaching the creek, reducing it to the small (though pleasant!) trickle it is today.

The rock is radiolarian chert – a sedimentary rock composed from the compressed silica-rich casings of dead single-celled marine organisms.  While not rare worldwide, it rarely outcrops in a way that is good for climbing. Apart from a few outcrops further up the Marin and Sonoma coasts, there is very little other chert climbing in the world.