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Hike

Thunder Lake - Timberline

Ends at Boulder-Grand Pass
Inside Rocky Mountain National Park
1,512 ft of climbing

1.4 mi one way · 1,512 ft climb · 12,086 ft high point · Easy

In Rocky Mountain National Park · Colorado · National Park Service

About Elevation Highlights Map Camp near here More hikes

About this hike

Thunder Lake to Timberline ascends 1,512 feet to Boulder-Grand Pass over 1.4 miles in Rocky Mountain National Park. Thunder Lake lies along the route.

Elevation

1,512 ft of gain and 20 ft of descent.

Camp near here

The closest places to sleep, measured from the trailhead.

See all on the map

5.8 mi from the trailhead
Rocky Mountain National Park Longs Peak Campground
Campground

More hikes nearby

Ranked the same way, within twenty-five miles.

Elevation along the trail from the start. Source: USGS 3DEP.

Highlights

What the trail reaches, measured from the start.

Boulder-Grand PassDestination · 1.4 mi in
Thunder LakeAlong the way · 0.1 mi in
Thunder FallsNearby · 0.0 mi in
ViewpointNearby · 0.0 mi in
Box LakeNearby · 0.0 mi in
Fan FallsNearby · 0.4 mi in
Falcon LakeNearby · 0.7 mi in
Pilot MountainNearby · 0.7 mi in
Tanima PeakNearby · 0.9 mi in
The CleaverNearby · 1.4 mi in

Nearby reading

Boulder-Grand Pass
Moomaw Glacier
Mount Alice (Colorado)

Map

The route at the trailhead. 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: 1.4 mi
Shape: One way
Gain: 1,512 ft
Descent: 20 ft
High point: 12,086 ft
Low point: 10,593 ft
Difficulty: Easy
Managed by: National Park Service
State: Colorado
Camps within 15 mi: 19
Trailhead: 40.2223° N · 105.6448° W

Get directions Open the map

5.9 mi from the trailhead

Longs Peak Campground

Campground · Colorado

6.0 mi from the trailhead

Meeker Park Overflow Campground

Campground · Colorado

8 mi from you

Fern Lake Trail

Ends at Marguerite Falls
Inside Rocky Mountain National Park Wilderness
2,742 ft of climbing

7.4 mi of trails · 2,742 ft climb

Rocky Mountain National Park Wilderness · Camp 3 mi away

Mount Ida

Summits Mount Ida
Inside Rocky Mountain National Park
2,551 ft of climbing

4.8 mi of trails · 2,551 ft climb · Easy

Rocky Mountain National Park · Camp 3 mi away

Twin Sisters Tr

Summits Twin Sisters Peaks
Inside Rocky Mountain National Park
2,177 ft of climbing

3.4 mi of trails · 2,177 ft climb · Moderate

Rocky Mountain National Park · Camp 2 mi away

Lower East Inlet Trail

Ends at Adams Falls
Inside Rocky Mountain National Park
1,798 ft of climbing

5.0 mi of trails · 1,798 ft climb · Moderate

Rocky Mountain National Park · Camp 3 mi away

Flat Top Mountain Trail

Summits Flattop Mountain
Inside Rocky Mountain National Park Wilderness
2,865 ft of climbing

4.2 mi of trails · 2,865 ft climb

Rocky Mountain National Park Wilderness · Camp 5 mi away

Flattop Mountain Trail

Passes Flattop Mountain
Inside Rocky Mountain National Park
2,622 ft of climbing

4.0 mi one way · 2,622 ft climb · Moderate

Rocky Mountain National Park · Camp 3 mi away

Signal

Cell coverage here

No carrier reports signal at this spot.

FCC coverage data · signal varies in remote terrain

More like this

Hikes that read like this one, wherever they are.

Timber Lake
- Ends at Timber Lake
- Inside Rocky Mountain National Park
- 2,464 ft of climbing
4.9 mi one way · 2,464 ft climb · Moderate
Rocky Mountain National Park · Camp 2 mi away
Thunder Lake Trail
- Ends at Thunder Lake
- Inside Rocky Mountain National Park Wilderness
Lion Lake Junction - Thunder Lake Trail
- Ends at Thunder Lake
- Inside Rocky Mountain National Park
Lion Lake Trail
- Passes Thunder Falls
- Inside Rocky Mountain National Park

1,825 ft of climbing

4.5 mi one way · 1,825 ft climb

Rocky Mountain National Park Wilderness · Camp 6 mi away

Tops out at 10,686 ft

1.9 mi one way · 630 ft climb · Moderate

Rocky Mountain National Park · Camp 6 mi away

1,117 ft of climbing

2.2 mi one way · 1,117 ft climb · Easy

Rocky Mountain National Park · Camp 5 mi away

Weather

7-day forecast

Today58°43°Chance Showers And Thunderstorms
Thu54°42°Showers And Thunderstorms Likely
Fri56°38°Mostly Cloudy
Sat53°33°Showers And Thunderstorms Likely
Sun49°31°Chance T-storms
Mon52°33°Mostly Sunny
Tue54°34°Mostly Sunny

Today: Chance Showers And Thunderstorms · wind 8 mph WSW

National Weather Service · refreshed hourly