3.0
(6)
34
hikers
Grass Lake Trail
01:19
4.46km
210m
Hiking
The Grass Lake Trail offers a delightful escape into the Desolation Wilderness, treating you to a journey through changing landscapes. You'll wind past the tranquil Lilly Lake, hear the rush of several waterfalls along Glen Alpine Creek, and eventually arrive at the picturesque Grass Lake, cradled by granite slopes. The…
Last updated: June 9, 2026
Tips
Your route passes through protected areas
Please check local regulations for:
Waypoints
Mount Tallac Trailhead Via Glen Alpine
Highlight • Trail
Tip by
176 m
Lilly Lake
Highlight • Lake
Tip by
1.19 km
Upper Glen Alpine Falls
Highlight • Waterfall
Tip by
1.82 km
Glen Alpine Barn
Highlight • Historical Site
Tip by
1.98 km
Glen Alpine Spring
Highlight • Natural Monument
Tip by
2.83 km
Grass Lake Junction
Highlight • Trail
Tip by
4.41 km
Grass Lake
Highlight • Lake
Tip by
4.46 km
End point
Way Types & Surfaces
Way Types
2.54 km
1.92 km
Surfaces
4.35 km
106 m
< 100 m
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Elevation
Highest point (2,210 m)
Lowest point (2,000 m)
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Weather
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Sunday 12 July
21°C
13°C
-- %
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This route was planned by komoot.
Frequently Asked Questions
How long does it take to hike the Grass Lake Trail?
This hike typically takes around 1 hour and 20 minutes to complete. However, allow extra time to enjoy the scenic views and highlights along the way.
Is the Grass Lake Trail suitable for beginners or families?
Yes, this specific route is rated as easy, making it suitable for beginners and families. While some Grass Lake Trails in the region can be more challenging, this particular komoot tour is designed to be accessible.
Where does the Grass Lake Trail start, and is there parking available?
The trail officially starts near the Mount Tallac Trailhead Via Glen Alpine. Parking is available in the vicinity, but it can fill up quickly, especially during peak season. Arriving early is recommended.
Do I need a permit to hike the Grass Lake Trail?
Yes, as this trail is located within the Desolation Wilderness, a wilderness permit is required for both day use and overnight stays. Permits help manage visitor numbers and protect the natural environment. Check the official Desolation Wilderness website for current regulations and to obtain your permit in advance.
Is the Grass Lake Trail dog-friendly?
Dogs are generally allowed on trails within the Desolation Wilderness, including this one, but they must be kept on a leash at all times. Please remember to pack out all pet waste to preserve the natural beauty of the area.
What is the best time of year to hike this trail?
The best time to hike this trail is typically from June through October, after the snow has melted. During this period, wildflowers may be in bloom, and water features like waterfalls and creeks are often at their fullest, offering a refreshing experience.
What can I see along the route?
The route offers diverse scenery and several notable highlights. You'll pass by the historic Glen Alpine Barn, the refreshing Glen Alpine Spring, and the beautiful Lilly Lake. You'll also encounter the impressive Upper Glen Alpine Falls before reaching Grass Lake itself.
What is the terrain like on the Grass Lake Trail?
The terrain is varied, ranging from well-maintained paths to some rocky sections and singletrack trails. You can expect some uphill portions, but overall, it's manageable for an easy-rated hike. Creek crossings might be present, especially in spring.
Does the trail intersect other well-known paths?
Yes, the route also passes through sections of the Glen Alpine Trail, the Lily Lake Trail, and the Tamarack Trail, offering connections to a broader network of paths within the Desolation Wilderness.
What should I pack for a hike on the Grass Lake Trail?
Even for an easy hike, it's wise to bring essentials. Pack plenty of water, snacks, sun protection (hat, sunscreen), layers of clothing, and sturdy hiking shoes. Don't forget your wilderness permit and a map or GPS device.
Are there any specific regulations for hiking in Desolation Wilderness?
Yes, beyond the required permits, Desolation Wilderness has strict regulations to protect its pristine environment. These include practicing Leave No Trace principles, proper waste disposal (including human and pet waste), campfire restrictions, and food storage requirements to prevent wildlife encounters. Always check the latest regulations before your visit.
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