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Grizzly Peak Century

Grizzly Peak Century

Moraga, CA 94575 US

30 miles

The 30 mile course has about 2,000 feet of climbing, so it isn't easy!
Start Time:
9:30am PDT
Registration:
Registration Opens November 15, 2025 at 12:00am PST
Price:
$70 $60.00
Registration:
Price increases to $70.00 after January 31, 2026 at 11:59pm PST

50 miles

The 50 mile course has about 4,400 feet of climbing. It is the heart of the 75 mile course but skips the northern portion. It offers plenty of climbing and great views. 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 continues on the ridge and around the north end of the Berkeley Hills to Castro Ranch Road. Then it's on to the Three Bears with a rest stop at Briones Regional Park. Finally, relatively easy riding on Moraga Way takes you back to the start for the post-ride meal.
Start Time:
7:30am PDT
Registration:
Registration Opens November 15, 2025 at 12:00am PST
Price:
$100 $90.00
Registration:
Price increases to $100.00 after January 31, 2026 at 11:59pm PST

75 miles

The 75 mile (actually about 73 mile) course with about 6,200 feet of climbing 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 Port Costa. From there it climbs McEwen Road for a run down into 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.
Start Time:
7:30am PDT
Registration:
Registration Opens November 15, 2025 at 12:00am PST
Price:
$100 $90.00
Registration:
Price increases to $100.00 after January 31, 2026 at 11:59pm PST

100 miles

The 100 mile course has roughly 9,000 feet of climbing. The route starts with an early morning south loop to the Ivy Park rest stop. Then it climbs the east side of the Oakland-Berkeley hills via Pinehurst Road, 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 Port Costa. From there it climbs McEwen Road for a run down into 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.
Start Time:
6:30am PDT
Registration:
Registration Opens November 15, 2025 at 12:00am PST
Price:
$100 $90.00
Registration:
Price increases to $100.00 after January 31, 2026 at 11:59pm PST

70K (Gravel)

The 70K gravel route explores some of the greatest hits in our wonderful East Bay Regional parks. The 70K route is identical to the 100K route without the early morning loop through Lake Chabot Park, so you should have some company on the trails. After a 4 mile paved lead-in, you'll hit the dirt to traverse Redwood Park on Eastridge Trail. Then enjoy the paved Skyline Drive and our namesake Grizzly Peak Blvd enroute to Seaview and other trails in Tilden Park. After the rest stop at Island Picnic Area you'll head down Wildcat Creek and then up and over the ridge to join the road riders for the trip back to St Mary's. The course covers about 41 miles with about 3,800 ft of elevation gain.
Start Time:
7:30am PDT
Registration:
Registration Opens November 15, 2025 at 12:00am PST
Price:
$70 $60.00
Registration:
Price increases to $70.00 after January 31, 2026 at 11:59pm PST

100K (Gravel)

The 100K gravel route explores some of the greatest hits in our wonderful East Bay Regional Parks. You'll start with a morning loop through Anthony Chabot Park before the first rest stop. Then traverse Redwood Park on Eastridge Trail and enjoy the paved Skyline Drive and our namesake Grizzly Peak Blvd enroute to Seaview and other trails in Tilden Park. After the rest stop at Island Picnic Area you'll head down Wildcat Creek and then up and over the ridge to join the road riders for the trip back to St Mary's. The course covers about 61 miles with about 6,000 ft of elevation gain. This route will challenge you while helping sharpen your early season fitness and affording you the beauty of the East Bay.
Start Time:
6:30am PDT
Registration:
Registration Opens November 15, 2025 at 12:00am PST
Price:
$100 $90.00
Registration:
Price increases to $100.00 after January 31, 2026 at 11:59pm PST

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