Mills Lake via Glacier Gorge Trail Hiking Guide
Mills Lake sits at the top of Glacier Gorge, one of the park's best-known lake destinations. The walk in passes Alberta Falls and Glacier Falls on a moderate grade, so it delivers big-mountain scenery for a half day. Here is the distance, how to get to the trailhead, and what the gorge is like out of season.
Permit: Rocky Mountain National Park requires an entrance pass at every hour of the year: $30 per private vehicle for one day or $35 for 7 days, $25 or $30 per motorcycle, $15 or $20 per person on foot or bike (16 and older), the $70 park annual pass, or an America the Beautiful pass. Non-US residents 16 and older pay an extra $100 each unless entering on an annual or America the Beautiful pass. Entrance stations take cards only. From late May to mid-October you also need a Timed Entry + Bear Lake Road reservation to drive onto Bear Lake Road between 5 a.m. and 6 p.m. (May 22 to October 18 in 2026); it costs a $2 Recreation.gov fee per vehicle. No permit is needed for the day hike.
Route and Mileage
AllTrails lists the round trip at 5.4 miles with 859 feet of gain; budget two and a half to three hours. The park's Bear Lake Road page gives 2.7 miles and 816 feet one way from Glacier Gorge; its older list says 2.8 miles and 750 feet. From the Bear Lake Trailhead instead, the park figures 2.8 miles and 727 feet. Beyond the lake, Jewel Lake is a short continuation and Black Lake lies farther up at 4.7 miles from the trailhead.
Falls and Slabs Along the Way
Alberta Falls comes first, under a mile in, and draws most of the crowd. Past it the trail climbs above Glacier Creek and passes Glacier Falls before the junction where the Loch Vale trail splits off; follow the signs for Mills Lake. Boulders line the shore and make good seats for lunch.
Trailhead Access and Repairs
Glacier Gorge's lot is small and fills early, so the park points hikers to Park & Ride and the free Bear Lake shuttle, which runs every 10 to 15 minutes in season. Over parts of two weeks in fall 2026 the park closed the lot and trailhead on weekdays for erosion repairs and routed hikers from Bear Lake, which adds little distance. Through summer and early fall, cars entering the corridor from 5 a.m. on need the Bear Lake Road version of timed entry until the 6 p.m. cutoff.
Snow Season in the Gorge
Rangers called the trail mostly dry with a few muddy spots in August. Once snow arrives, usually by late October at this elevation, AllTrails notes that snowshoes, microspikes or crampons may be needed and that avalanche conditions are worth checking. AllTrails notes the hike is popular in winter too, but winter weather in the high park can be extreme, so carry extra layers.
Hiking tips for Mills Lake via Glacier Gorge Trail
- Use the shuttle from Park & Ride if Glacier Gorge is full by early morning.
- Follow the Mills Lake signs at the Loch Vale junction.
- Bring a warm layer; the park warns of 10 to 20 degree drops when storms roll in.
- Add Jewel Lake for a few extra minutes of quieter shoreline.
- Carry traction from late fall onward for packed snow on the slabs.
Nearby trails to explore
- Alberta Falls Trail
- Sky Pond via Glacier Gorge Trail
- Emerald Lake Trail (Rocky Mountain National Park)
Hike this trail with TrailMates
Mills Lake makes a moderate half day that's easy to plan with others. Use TrailMates to find Estes Park hikers heading into Glacier Gorge. Download the TrailMates app to connect.