Grass Lake – Big Bear Lake loop from Blairsden

If you're an advanced mountain biker near Blairsden looking for a serious test of skill and endurance, the Grass Lake – Big Bear Lake loop from Blairsden is definitely worth your time. This difficult 26.5-mile (42.6 km) mountain biking route packs in 3454 feet (1053 metres) of climbing, typically taking around 4 hours and 14 minutes to complete. It's a challenging adventure best suited for experienced riders who thrive on technical terrain.

What to expect on Grass Lake – Big Bear Lake loop from Blairsden

The journey begins on the Grass Lake Trail, a scenic connector that winds past a notable waterfall at its northern end and a pleasant campground. This section offers a good warm-up before you hit the main event. The route then merges with the Bear Lakes Loop, where the real challenge begins. The northern part of this loop is rated as a Double Black Diamond, meaning you'll encounter very rocky and steep sections that are basically unclimbable for many riders. Expect to dismount and push your bike through some of these demanding stretches. The natural beauty of the Lakes Basin area provides a stunning backdrop, but your focus will be on navigating the technical terrain, making this a route for those who enjoy pushing their limits.

Planning your visit

This challenging loop is located near Portola, California, close to Blairsden, and is designed for advanced mountain bikers. Given the extreme technical difficulty of parts of the Bear Lakes Loop, ensure your bike is in top condition and you are prepared for a physically demanding ride. Always carry plenty of water and be ready for varied conditions in the Lakes Basin area.

Trail details

• Distance: 26.5 miles (42.6 km)
• Elevation gain: 3454 feet (1053 metres)
• Difficulty: difficult
• Estimated time: 4 hours and 14 minutes