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© 2026 Roaming.Camp · Data from NPS, Recreation.gov, BLM, USFS, NWS, and the FCC.Operating on ceded ancestral land.Photography via Unsplash.

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Hike

Middle Rainbow Lake

Passes Big Trinity Lake
Inside Boise National Forest
1,877 ft of climbing

6.4 mi out & back · 1,877 ft gain · 8,435 ft high point · Moderate

From Rainbow Basin Trailhead via Rainbow Basin (3.0 mi)

In Boise National Forest · Idaho · U.S. Forest Service

Elevation Highlights Map Camp near here More hikes

Elevation

1,877 ft of gain round trip.

Camp near here

The closest places to sleep, measured from the trailhead.

See all on the map

0.6 mi from the trailhead
Big Trinity Cabin
Campground · Idaho

More hikes nearby

Ranked the same way, within twenty-five miles.

24 mi from you
Scenic Lake
- Ends at Scenic Lake
- Inside Boise National Forest
- 4,097 ft of climbing
19.3 mi out & back · 4,097 ft gain · Very hard
Boise National Forest · Camp 4 mi away

Out: 900 ft up, returns the same way. Source: USGS 3DEP.

Highlights

What the trail reaches, measured from the start.

Big Trinity LakeAlong the way · 0.1 mi in
Little Trinity LakeNearby · 0.0 mi in
Fiddle LakeNearby · 1.7 mi in
Trinity MountainNearby · 2.3 mi in
Trinity LookoutNearby · 2.3 mi in

Nearby reading

Trinity Mountain (Idaho)

Map

The hike from its start, the approach dashed. Drag with two fingers, or hold a key to zoom.

Trail data: USFS, NPS, © OpenStreetMap contributors (ODbL). Elevation: USGS 3DEP via Mapzen terrain tiles. Nearby reading: Wikipedia. Download the trail and feature data.

At a glance

Length: 6.4 mi
Shape: Out & back
Gain: 1,877 ft round trip
High point: 8,435 ft
Low point: 7,775 ft
Difficulty: Moderate
Managed by: U.S. Forest Service
State: Idaho
Camps within 15 mi: 10
Start: Rainbow Basin Trailhead
Trailhead: 43.6251° N · 115.4254° W

Get directions Open the map

1.0 mi from the trailhead

Big Roaring River Lake Campground

Campground · Idaho

2.6 mi from the trailhead

Trinity Warming Hut

Cabin & lookout · Idaho

25 mi from you

Perkins Creek

Ends at Perkons Lake
Inside Sawtooth National Forest
2,531 ft of climbing

5.3 mi out & back · 2,531 ft gain · Very hard

Sawtooth National Forest · Camp 5 mi away

Rainbow Basin

Passes Big Trinity Lake
Inside Boise National Forest
2,721 ft of climbing

8.9 mi out & back · 2,721 ft gain · Easy

Boise National Forest · Camp under a mile away

Fiddle Lake

Ends at Fiddle Lake
Inside Boise National Forest
1,218 ft of climbing

4.0 mi out & back · 1,218 ft gain · Moderate

Boise National Forest · Camp under a mile away

Big Lookout Lake

Ends at Fiddle Lake
Inside Boise National Forest
1,107 ft of climbing

3.9 mi out & back · 1,107 ft gain · Moderate

Boise National Forest · Camp under a mile away

Little Lookout Lake

Ends at Fiddle Lake
Inside Boise National Forest
1,062 ft of climbing

3.5 mi out & back · 1,062 ft gain · Moderate

Boise National Forest · Camp under a mile away

Weather

7-day forecast

Sat49°37°Partly Sunny
Sun53°38°Chance Rain Showers
Mon55°32°Mostly Sunny
Tue54°34°Sunny
Wed53°34°Sunny
Thu53°33°Sunny
Fri50°Mostly Sunny

Sat: Partly Sunny · wind 6 to 9 mph SW

National Weather Service · refreshed hourly

Signal

Cell coverage here

No carrier reports signal at this spot.

FCC coverage data · signal varies in remote terrain