LAKE SONOMA MTB

March 22nd, 2025 Register

The Lake Sonoma MTB Grasshopper is a thrilling mountain bike race that challenges riders with some of the most technical, flowy singletrack in Northern California. Set in the rugged landscape around Lake Sonoma, this 27-mile loop course features steep climbs, fast descents, and over 4,000ft of climbing—with no easy way out. Offering both a full and short course, it’s a demanding yet rewarding experience that brings together mountain bikers of all levels for an unforgettable day on the trails.

4304 ft

28mi

10% Paved

90% Dirt

Route

The Lake Sonoma MTB long loop is back, featuring Northern California’s toughest, flowy single track. After recent impassable years, a bridge at Rancheria Creek will be set up by Healdsburg Running Co. and Friends of Lake Sonoma to ensure access in case of high water.

Starting from the South Vista overlook and following a clockwise route, the trail demands constant climbing and descending, modeled after the Tevis Cup horse race trail. With over 4,000 feet of climbing across 27 miles—and no bailout points—this challenging loop isn't for everyone. A shorter course option north of Rockpile Rd offers a more accessible alternative, sharing the same finish as the long course.

All Hopper routes are open and riders must obey all traffic laws and rules.

Short Course

16mi

2534ft

19% Paved

81% Dirt

Friends of Lake Sonoma

The Friends of Lake Sonoma Foundation is committed to protecting the natural beauty, wildlife, and recreational opportunities of Lake Sonoma. Through conservation, education, and community support, we ensure the lake remains a cherished resource for generations to enjoy.

Redwood Trails Alliance

Redwood Trails Alliance works to build, maintain, and advocate for trails that connect people with nature throughout the North Bay. By fostering stewardship and collaboration, they create sustainable trail systems that inspire outdoor adventure and strengthen community bonds.

More Info

  • Saturday March 22nd, 2025
    7:00 AM: Registration opens
    8:45 AM Rider meeting at start gantry
    9:00 AM Start:
    Start Times:

    • E-Bikes: 9:00

    • All Age Groups and Pro: 9:10

    • Short Course: 9:10

    1:30 PM: Lunch 
    2:30: Podium

    • Registration opens October 7, 2025 and closes March 19th, 2025

    • Day-of registration is available if the event is not sold out and incurs an additional $20 fee on top of standard registration fee.

    • The deadline to transfer your registration to another rider is March 19th, 2025 at 11:59PM PST

  • Packet pick up will be the day of the event at the event venue from 6:30-8:00 AM

  • Grasshoppers have always been about adventure, exploration and pushing your limits. Come to race, or come to adventure and explore. Riders may choose their category and licenses are not required. All Hopper routes are open and riders must obey all traffic laws and rules. See RULES OF ENGAGEMENT

    Male: Pro, U18, 19-29, 30-39, 40-49, 50-59, 60+, Single Speed, E-Bike
    Female: Pro, U18, 19-29, 30-39, 40-49, 50-59, 60+, Single Speed, E-Bike
    Non-Binary

  • Details TBD

    • Camping is allowed Friday and Saturday. We have sites #1 and #2 at the Warm Springs Picnic Area. See MAP here.

  • We’ve created a group page for riders. You can post if you are looking for an entry, looking to sell a spot, have questions about tires and road conditions, looking to ride share, camping/lodging etc. To join the group, go to Grasshopper Group. (Note: This is NOT the official Grasshopper Facebook page)

  • Aid Station: (Location TBD). 
    We’ll have water, Skratch hydration, nutrition, GU Energy, and snacks for you.

    Bottle Drop: If you wish to leave a bottle with your name clearly labeled on it you may leave it with the
    NorCal BikeSport van at the start. (No hand-ups) .

    ALL riders must fill their own bottles. Individual support is not allowed at the feed zone. No attacking in the feed zone area or you will be DQd and excommunicated from the church of bike.

    • A crazy hard, super fun adventure with a bunch of your new and old cycling buddies.

    • Feed zones with Skratch and GU Energy Labs hydration & nutrition. Presented by Trailhouse, NorCal Bike Sport, and Bike Peddler.

    • Awesome prizes at the finish from our generous sponsors.

    • Event timing and results.

    • Hot coffee and fresh baked pastries from Black Oak Coffee Roasters the morning of each event.

    • Delicious lunch, cold Guayaki and Best Day Brewing beer at the finish.

    • Podiums for Top 3 All Categories long courses, and for Top 3 M/F/NB Overall short courses.

    • Cash prizes for Top 3 Pro M/F Overall.

    • Emergency Medical Support en route.

    • Unforgettable stories of adventure.

    • Free event photos from FinisherPix