Hiking to Mills Lake – A Perfect Day in Rocky Mountain National Park

One of my favorite hikes in Rocky Mountain National Park was the trail to Mills Lake. Tucked away in the Glacier Gorge area, this trail offers everything you dream about in Colorado hiking: rushing streams, waterfalls, towering peaks, and a sparkling alpine lake framed by dramatic mountain backdrops.

Getting Into the Park

Because this hike is located along Bear Lake Road, we had to reserve a timed entry permit in addition to the standard park entry. We needed timed entry + Bear Lake Road. Permits open in advance, but if the dates you want are full, don’t give up—additional tickets are released the day before at 7 p.m. It’s worth setting a reminder, especially if your heart is set on this hike. Here is a link for timed entry information at Rocky Mountain National Park.

The Trail

The hike to Mills Lake is about 5.4 miles round trip with an elevation gain of roughly 840 feet. It’s rated as moderate, and I’d agree—it was a great hike for the whole family.

Starting from the Glacier Gorge Trailhead, the trail winds through shady forest before reaching one of its first highlights: Alberta Falls. The rushing water tumbling down the rocks is such a perfect spot to pause and soak it all in. From there, the trail grows steeper and a little rockier as it climbs toward Mills Lake.

Along the way, we passed beautiful streams, mossy boulders, and wide-open views of the mountains. Every turn seemed to bring a new postcard-worthy scene.

Mills Lake

When we finally arrived at Mills Lake, it felt like stepping into a dream. The lake is surrounded by Longs Peak and the Keyboard of the Winds, which tower dramatically above the shimmering water. We sat on the granite slabs at the edge of the lake eating snacks, just taking it all in—the sparkling reflections, the stillness of the water, and the sheer beauty of the Rockies. Heres more information on the hike to Mills lake from the National Park Service.

It’s one of those spots that makes the effort of the hike completely worth it.

Post-Hike Reward

After making our way back down, we capped off the day with a late lunch at Bird and Jim, a local favorite just outside the park in Estes Park. Their fresh, locally inspired dishes were the perfect reward after a few hours on the trail.

Final Thoughts

Our day at Mills Lake was truly perfect—a little bit of adventure, a lot of natural beauty, and the best company. If you’re planning a trip to Rocky Mountain National Park, make sure this hike is on your list. Just remember to grab that timed entry permit and pack a picnic or plan a stop at Bird and Jim’s afterward.

Mills Lake really is the kind of place that stays with you long after you’ve left.