At a Glance
- Adams Falls: 0.4 miles
- Lone Pine Lake: 5.4 miles
- Difficulty: Easy to Strenuous
- Season: May–Oct
The Full East Inlet Trail
East Inlet Trail begins at the East Inlet Trailhead in Grand Lake and extends deep into Rocky Mountain National Park. The trail passes Adams Falls at 0.4 miles, then climbs gradually through forest and meadow before steepening toward the higher lake basins. Lone Pine Lake at 5.4 miles makes an excellent day hike destination — a remote alpine lake surrounded by peaks.
Beyond Lone Pine Lake, the trail continues to Lake Verna, Spirit Lake, and Thunder Lake — destinations for multi-day backpacking trips requiring backcountry permits from the National Park Service.
Day Hike Options
For a half-day hike from Grand Lake, the section from the trailhead to Adams Falls and back is suitable for all ages. For a full day, hiking to Lone Pine Lake and back covers 10.8 miles round trip with moderate elevation gain — a rewarding but demanding day on the trail. Carry plenty of water and food, and start early to be off the high sections before afternoon thunderstorms.
The East Inlet valley is particularly beautiful in late June when wildflowers bloom along the creek and in September when aspen turn gold.
Backcountry Permits
Overnight camping along the East Inlet Trail requires a backcountry permit from Rocky Mountain National Park. Permits are available through recreation.gov and through the RMNP Backcountry Office in Grand Lake. Walk-up permits are available at the office but fill quickly during summer peak season. Plan and reserve permits well in advance for summer backcountry trips.
Day hikers do not need permits — just a park entry fee or America the Beautiful pass.
The Closest Major Trailhead to Town
East Inlet sits at roughly 8,391 feet, reached by driving east from Highway 34 toward Grand Lake and bearing left at all forks. It is nearer the village than any other significant trailhead, which is why it carries so much of the area's foot traffic.
Published figures give Adams Falls at around 0.6 miles with under 80 feet of gain; Lone Pine Lake at roughly 11 miles with about 1,494 feet; and Lake Verna at around 13.8 miles with some 1,809 feet.
A Trail That Sheds People Quickly
The first half mile to Adams Falls is busy through the summer. Past the falls the numbers drop sharply, and by the time the trail is climbing in earnest most of the crowd has turned back.
That makes it unusually good for a group with mixed ambitions — some can walk twenty minutes to a waterfall and return, while others carry on toward Lone Pine or Verna from the same start.
Parking Is the Constraint
The car park fills early through the summer, and its proximity to town is exactly why. Groups staying at the cabins have the advantage of a short drive, which makes a first-light departure realistic rather than aspirational.
Dogs are not permitted on national park trails, so this is a park day. For a walk where the dog can come, the forest and recreation-area land south of Grand Lake is the alternative.
Distances, elevation gain and difficulty above are drawn from published trail listings and are given as a guide. Published figures vary between sources, and trail conditions, closures and access change through the season. Check current conditions with the National Park Service at nps.gov/romo before setting out.