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Colorado United
Mills Lake Trail

Mills Lake Trail

Rocky Mountain National Park • Estes Park, Colorado

moderateout and back
5.3
Miles
750
Elevation Gain (ft)
3
Hours
9,940
High Point (ft)

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

Alberta Falls along the route
Direct Longs Peak views from the lake
Glacier Gorge geology
Gateway to Loch Vale + Sky Pond

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.

☀️summer
🍂fall

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 · website
Found 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.

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

County:Larimer
Nearest City:Estes Park
Parking Pass:National Park Pass
Dog-Friendly:No
Kid-Friendly:No

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