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The 50 mile (actually about 52 mile) Half Century course has about 4,200 feet of climbing. It is the heart of the Metric course but skips the northern portion. It offers plenty of climbing, great views, and a sufficient amount of exercise. From the start at Campolindo High School 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 drops down alongside San Pablo Reservoir. It bypasses the Port Costa and Martinez portion of the Metric route and rejoins to go through the hills around Briones Reservoir to the rest stop at Briones Regional Park. Finally, relatively easy riding on Moraga Way and Moraga Road takes you back to the start for the post-ride meal.

Alternative Car-Free Start

If you use our car-free start at Island Picnic Area, just join the regular route and you will eventually get to Campolindo High School where the barbeque takes place. Enjoy your meal, then ride the 13+ miles back past Island (which will be long since closed), or deviate from the course at whatever point is best for your return trip home. Use the directions on the start of the cue sheet if you need help.

Tricky Bits

At mile 4.4 all riders turn right onto Pinehurst Road. The yellow markings on the road will say GPC AM with an arrow to the right. Do not be confused by the marks that say GPC PM, which point to the left. Those are for the full century riders on the afternoon loop.

At mile 31.2 turn right onto Alhambra Valley Road. All other routes go left here, so be careful not to follow them.

At mile 37.9 turn left into Briones Park to go to the rest stop. It is on a fast descent, so easy to miss.

At mile 49.3 continue straight. At this point, the Full Century riders will turn right, so there will be additional road markings for that route. Be carefull not to follow riders who are not on your route.

Don't Start Too Early

For our 50 mile route, please do not leave too early. The route is designed for people who ride 12 mph average or less and want to enjoy the scenery. If you start too early, like before 7 AM, or hammer the route, you will arrive at our Briones rest stop before its opening 9:45 AM, and possibly at lunch before its opening at 11 AM. This route is truly very scenic and should be enjoyed! Slow down, be safe, and enjoy the ride!


Below is a tentative map. You will receive a final map at registration. Note that you can click on View Full Version to see more details or Send to Device to export files suitable for your GPS device.

Cue Sheet

We have a tentative cue sheet available now. You will receive a final cue sheet at registration.