St. Mary's College:

• 100 mi & 100K Gravel - Check-in is 6:30 am to 7:30 am and start anytime.

• 50 mi, 75 mi, 70K Gravel - Check-in is 7:30 am to 8:30 am and start anytime.

• 30 mi - Check-in is 9:00 am to 9:30 am. Start after 9:30am. 

Island Rest Stop (Alternative Car-Free):

• Alternative start at Island Picnic Area in Tilden Park.

• 30 mi, 50 mi, 75 mi, and 100 mi routes only - Check-in 8:30 am to 11:30 am.

• Your choice of many beautiful routes

• Cue sheet and road markings

• Rest stops at 15 - 25 mile intervals

• Clothing drop at Island Picnic Area rest stop

• Basic mechanic service at rest stops

• SAG vehicle support

• A fabulous post-ride barbeque, including live music and a free beer (or two) from local favorite Oakland United beerworks.

• A souvenir pair of GPC Century socks

Hot food is available at the finish (St Mary's) from noon until 6:00 pm.

(The post-ride meal is included for rider. You can purchase extra meal tickets for friends & family here)

• The Grizzly Peak Century is a tour, not a race. Riders must obey the California Vehicle Code, and follow all the rules of the road. Riders may be cited for violations of the Vehicle Code.

• Riders must wear bicycle helmets at all times when on their bicycles. No helmet — no route sheet, no food, no exceptions.

• Riders are responsible to ensure that their bicycles are in superb mechanical condition, especially cables, brakes, tires and bar-end plugs.

• For a pre-century bike check, see our sponsors page.

• Riders should carry supplies to repair and inflate a flat tire, a water bottle (two, if forecast temps are above 70 degrees), money, and identification.

• Please be courteous to other road users. Your behavior reflects on our entire bicycling community.

Riders are requested to keep unwashed hands and bike gloves away from the food tables. We ask that you remove your bike gloves and wash/disinfect your hands, or else let the century volunteers serve you. We appreciate your cooperation. Thank you.

You can drop excess clothing at the Island rest stop and we'll move it to St Mary's (the finish). Not from other rest stops. You just fill a paper bag, write your name on it, and we'll transfer the bags. We'll do our best, but you use this clothing drop at your own risk.

The century takes place on popular cycling roads. There will be riders on the course who are not doing the century, or not doing the route you are riding. Don't follow! Do your own navigation.

eBikes are welcome on all of our road routes. For the gravel routes, only Class 1 ebikes are permitted due to restrictions in East Bay Regional Parks. Class 1 ebikes are those with only pedal-assist (no throttle) and a limit of 20mph for the assist.

Our famous Grizzly Peak Century post-ride meal is hearty, homemade, and hot — gourmet cycling food with plenty of vegetarian and vegan options. The rest stops along the way provide fruit, handcrafted cookies, homemade breads, and more prosaic carbs.