
Mills Lake Trail
Rocky Mountain National Park • Estes Park, Colorado
Overview
Mills Lake is the lake at the mouth of Glacier Gorge, 2.8 miles from the Glacier Gorge trailhead past Alberta Falls, with Longs Peak and the spires of the Keyboard of the Winds standing straight up the gorge from its far shore. It is the best view in the Bear Lake corridor for the effort, 750 feet of gain on a good trail, and the trailhead is also the start for Loch Vale and Sky Pond, which is why its lot is full at 6 AM.
Trail Highlights
The Route
From the Glacier Gorge trailhead, the trail climbs gently through aspen and pine to Alberta Falls at 0.8 mile, a 30-foot cascade on Glacier Creek that is the family turnaround. Above the falls the trail climbs through rock and forest to the Glacier Gorge junction at about 1.9 miles, where the Loch Vale trail goes right.
Stay left for Mills Lake. The trail crosses Glacier Creek on footbridges and climbs over granite slabs to the lake at 9,940 feet, a long lake with flat rocks along its east shore for sitting and the gorge running south to Longs Peak. Jewel Lake is a short walk beyond, and Black Lake is 2 miles farther up the gorge for a long day. Return the same way for 5.3 miles.
Getting to the Trailhead
The Glacier Gorge trailhead is on Bear Lake Road, a half mile below Bear Lake, and is a shuttle stop. The lot holds about 30 cars and is full by 6 AM in summer; the Bear Lake shuttle from the Park and Ride is the reliable way in, and the Bear Lake lot is a half-mile walk down the connector trail. The Bear Lake corridor timed-entry permit and the park entrance fee apply. Toilets at the trailhead.
Best Time to Hike
The trail to Alberta Falls is clear by May and the lake by mid-June; July through September is the season, with the falls loudest in June. Afternoon storms build over Longs Peak by early afternoon in July and August, and the slabs at the lake are open; the retreat to the trees is quick. The aspen along the lower trail turn in the last week of September. In winter the trail to the lake is a popular snowshoe and microspike route.
Good to Know
No dogs anywhere on park trails. The walk to Alberta Falls suits any kid; the full trip to the lake is why the listing is for older ones, and school-age children manage it. Carry water; the lake needs a filter. The slabs at the lake are the picnic spot and the place to be off before the storm. Estes Park is 25 minutes away. The best hikes in RMNP roundup covers Loch Vale and Sky Pond from the same trailhead, and the Bear Lake trailhead guide covers the shuttle.
Sources
Figures and access details on this page were checked against these pages on 2026-09-04. Conditions change; confirm with the managing agency before you go.
Who to call
Conditions, closures, permits, and anything left behind on Mills Lake Trail.
- Managed by
- Rocky Mountain National Park Information Office, National Park Service
(970) 586-1206 (Estes Park, daily 8 to 4 in summer; Mon to Fri 8 to 4 and weekends 8 to noon in winter) · website - Lost and found, non-emergency
- Larimer County Sheriff's Office
(970) 498-5198 (lost and found), non-emergency (970) 416-1985 · websiteFound property goes through the Property and Evidence Unit. - Emergency
- 911. Cell coverage is patchy on most of these trails; a text to 911 can get through where a call cannot.
Numbers checked 2026-10-04. Colorado United is an independent guide, not the land manager; wallets, keys, and dogs found on the trail go to the offices above.
What to Pack
Gear guides for this kind of hike:
Frequently Asked Questions
How long does the Mills Lake Trail take?
Most hikers finish the 5.3-mile route in about 3 hours, plus stops. Allow extra time at altitude and for photos.
How hard is the Mills Lake Trail?
It is rated moderate, with 750 feet of gain over 5.3 miles and a high point of 9,940 feet. Expect a real workout but no technical sections.
Is the Mills Lake Trail dog-friendly?
No, dogs are not permitted on this trail.
When is the best time to hike the Mills Lake Trail?
The best seasons are summer and fall. Start early to beat both the crowds and Colorado's afternoon thunderstorms.
Do I need a pass or permit for the Mills Lake Trail?
You need a National Park entrance pass, and many park trailheads also require a timed-entry reservation in peak season. Check the park website before you drive out.
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Trail Information
Nearby Trails in Rocky Mountain National Park
Connected pages
- Hikes near Estes Park
All curated trails in the Estes Park area.
- Hiking in the Rocky Mountain National Park
Regional trail guide.
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