Grass Lake – Big Bear Lake loop from Gold Lake Dam
Grass Lake – Big Bear Lake loop from Gold Lake Dam
4.8
(2066)
9,405
riders
Grass Lake – Big Bear Lake loop from Gold Lake Dam
04:00
38.5km
1,010m
Mountain biking
Hard mountain bike ride. Very good fitness required. Advanced riding skills necessary. Some portions of the route may require you to push your bike. The starting point of the route is right next to a parking lot.
Last updated: April 9, 2026
Tips
Includes a very steep uphill segment
You may need to push your bike.
After 33.0 km for 739 m
Waypoints
Start point
Parking
Get Directions
7.41 km
Mills Peak Lookout
Highlight • Viewpoint
Tip by
13.6 km
Mills Peak Trail
Highlight • Trail
Tip by
34.6 km
Grass Lake
Highlight • Lake
37.1 km
Big Bear Lake
Highlight • Lake
Tip by
38.5 km
End point
Parking
Way Types & Surfaces
Way Types
16.6 km
13.3 km
5.18 km
2.87 km
537 m
Surfaces
18.2 km
16.0 km
1.67 km
1.40 km
955 m
222 m
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Elevation
Highest point (2,210 m)
Lowest point (1,340 m)
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Weather
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Today
Friday 26 June
19°C
9°C
26 %
Additional weather tips
Max wind speed: 24.0 km/h
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Our route recommendations are based on thousands of hikes, rides, and runs completed by other people on komoot.
Description
If you're looking for a serious mountain biking challenge in the Sierra Nevada, the Grass Lake – Big Bear Lake loop from Gold Lake Dam delivers. This difficult 23.9-mile (38.5 km) route packs in 3320 feet (1012 metres) of climbing, taking around 4 hours for experienced riders. It's a true test of skill and endurance, best suited for those who love technical terrain and don't mind some hike-a-bike sections.
What to expect on Grass Lake – Big Bear Lake loop from Gold Lake Dam
Expect a rugged journey through the stunning Lakes Basin Recreation Area. The route winds past crystal-clear waters of Big Bear Lake, Little Bear Lake, and Grass Lake, offering panoramic views of the Sierra Buttes and surrounding alpine landscape. You'll encounter technical, rocky, and steep sections with granite steps and narrow trails, often requiring you to push your bike. The northern part of the Bear Lakes Loop, in particular, is notoriously challenging, making this ride ideal for advanced mountain bikers seeking a true test of their abilities.
Planning your visit
Access to the Gold Lake area, where this loop begins, is via the scenic Gold Lake Highway. Be aware that this mountain road closes in winter due to deep snow, so plan your visit for the warmer months. While specific parking details aren't provided, expect to find trailhead parking near Gold Lake. Always check current trail conditions before heading out, especially early or late in the season.
Trail details
- Distance: 23.9 miles (38.5 km)
- Elevation gain: 3320 feet (1012 metres)
- Difficulty: difficult
- Estimated time: 4 hours
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