There are six standard routes to choose from, all of them very hilly: 

  • 35 miles (~2,600 ft of climbing)
  • 50 miles (~4,.400 ft of climbing)  
  • 75 miles (~6,200 ft of climbing)  
  • 100 miles (~9,000 ft of climbing)  
  • 50K Gravel (~4,200 ft of climbing)  
  • 100K Gravel (~8,500 ft of climbing)  

The 35 mile route starts at St. Mary's College and heads out Moraga Way to the classic "Three Bears" loop, including the rest stop at Briones.  Then it's on to the finish for the post-ride meal. 

The 50 mile "half century" route shortcuts the northern part of the 75 mile route. It is the heart of the 75 mile course but skips the northern portion. It offers plenty of climbing and great views.

The 75 mile (actually about 73 miles) course  is bit longer than a metric century and is our most popular route. From the start at St. Mary's College, it climbs the east side of the Oakland-Berkeley Hills via Pinehurst Road, then follows the ridge up and over Grizzly Peak and into Tilden Park to the rest stop at Island Picnic Area. It then heads north to the edge of the Bay and the Carquinez Strait to the rest stop at Crockett.  From there it climbs McEwen Road for a run down into Franklin Canyon and Alahambra Valley, then over Pig Farm Hill and through the hills around Briones Reservoir to the rest stop at Briones Regional Park. Finally, relatively easy riding on Moraga Way takes you back to the start for the post-ride meal. 

The 100 mile route does a south loop to a rest stop.  Then, it climbs the east side of the Oakland-Berkeley hills via Pinehurst Rd. and follows the ridge up and over Grizzly Peak and into Tilden Park to the rest stop at Island picnic area.  It then heads north to the edge of the Bay and the Carquinez Strait to the rest stop at Crockett. From there it climbs McEwen Road for a run down Franklin Canyon and Alhambra Valley, then over Pig Farm Hill and through the hills around Briones Reservoir to the rest stop at Briones Regional Park.  Finally, relatively easy riding on Moraga Way takes you back to the start for the post-ride meal.

The 50K Gravel route follows the 100K course (below) and skips the Chabot section to send you back to St. Mary's College by way of Redwood Regional East Ridge trail.

The 100K Gravel route explores some of the greatest hits in our wonderful East Bay Regional parks. The first half of the day will take you through Sibley, Tilden and Wildcat before turning south to revisit Sibley en route to Chabot where the difficulty ramps up! This route will challenge you while helping to sharpen your early season fitness and affording you the beauty of the East Bay.

If you are a member of Grizzly Peak Cyclists, you can enter your member ID number below for a discount on registration. If you are not a GPC member, just leave it blank and continue to "Route Options".

I Forgot My Number

Event Merchandise

  • T-shirt - Women's Short Sleeve V-Neck

    T-shirt - Women's Short Sleeve V-Neck

    District DM1350L Women's Tri-blend V-neck T-shirt. Women's sizing


  • T-shirt - Men's Short Sleeve

    T-shirt - Men's Short Sleeve

    District DM130 Men's Tri-blend T-shirt. Men's sizing.


  • T-shirt - Long Sleeve

    T-shirt - Long Sleeve

    Sport-Tek ST350LS Long Sleeve PosiCharge Competitor T-Shirt. Men's sizing. Note: This shirt runs a bit large-take into account when selecting your size.


Post-ride Meal

The post-ride meal is included for rider. You can purchase extra meal tickets for friends & family below:

($15.00/ea.)

GPC Membership:

  • $10 off annual membership dues.

  • $10 off annual membership dues.


Grizzly Peak Cyclists, Inc. Waiver and Release of Liability, Assumption of Risk Agreement, and Parental Consent Agreement with Indemnity

In return for being allowed to participate in any activity by Grizzly Peak Cyclists, Inc. (GPC):

1. I acknowledge that I and other participants may be engaging in activities that involve risk of serious injury to me, including viral and bacterial infections, other communicable illnesses, permanent disability, and death. I understand that these risks may be increased through my own actions, or through the negligent action or inaction of Grizzly Peak Cyclists members or representatives. I therefore assume all risks of injury or loss, even if caused in whole or in part by the negligence of Grizzly Peak Cyclists, its members, or other representatives.

2. I release from liability Grizzly Peak Cyclists, the East Bay Regional Parks District, Saint Mary's College, their officers, members, sponsors, and employees; and owners and lessors of facilities used by Grizzly Peak Cyclists, for any injury or damage that I may incur as a result of their activities, even if caused in whole or in part by their negligence.

3. California Civil Code section 1542 states: 'A general release does not extend to claims which the creditor does not know or suspect to exist in his favor at the time of executing the release, which if known by him must have materially affected his settlement with the debtor.' I specifically waive the terms of that section, and agree to release claims that I may not yet know of, or which may be based on events that have not yet occurred.

4. If I am allowing children under the age of 18 to participate in any activity, I agree on their behalf to the terms of this Release. I agree that if, notwithstanding this Release, I, the minor, or anyone on the minor's behalf makes a claim against any of the persons or entities Released, I will indemnify those persons and entities and hold them harmless against all expenses, damage or costs, including attorneys fees, arising out of that claim.

This is a Release. When you agree to it, you forever give up certain rights to sue the persons and entities referred to in this Release. READ IT CAREFULLY.


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