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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

Sidney Trail

Ends at Dora Thorn LAke
Inside Deerlodge National Forest
1,338 ft of climbing

2.5 mi one way · 1,338 ft climb · 8,622 ft high point · Easy

In Deerlodge National Forest · Montana · U.S. Forest Service

About Elevation Highlights Map Camp near here More hikes

About this hike

Sidney Trail reaches Dora Thorn Lake in 2.5 miles one way, ascending 1,338 feet in Deerlodge National Forest.

Elevation

572 ft of gain and 1,338 ft of descent.

Camp near here

The closest places to sleep, measured from the trailhead.

See all on the map

6.4 mi from the trailhead
Racetrack Cabin
Campground · Montana

More hikes nearby

Ranked the same way, within twenty-five miles.

7 mi from you
Trask Lakes
- Ends at Alpine Lake
- Inside Deerlodge National Forest
- 1,984 ft of climbing
6.1 mi one way · 1,984 ft climb · Easy
Deerlodge National Forest · Camp 4 mi away
17 mi from you

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

Highlights

What the trail reaches, measured from the start.

Dora Thorn LAkeDestination · 2.6 mi in
Boulder LakesNearby · 1.4 mi in
Sidney LakeNearby · 2.1 mi in
Crystal LakeNearby · 2.6 mi in
Copper Creek LakesNearby · 2.6 mi in

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: 2.5 mi
Shape: One way
Gain: 572 ft
Descent: 1,338 ft
High point: 8,622 ft
Low point: 7,509 ft
Difficulty: Easy
Managed by: U.S. Forest Service
State: Montana
Camps within 15 mi: 8
Trailhead: 46.3279° N · 113.1526° W

Get directions Open the map

9.7 mi from the trailhead

Flint Creek Campground

Campground · Montana

9.8 mi from the trailhead

Lodgepole Campground (on Georgetown Lake, Montana)

Campground

Twin Lakes

Ends at Storm Lake
Inside Deerlodge National Forest
2,192 ft of climbing

8.7 mi one way · 2,192 ft climb · Easy

Deerlodge National Forest · Camp 4 mi away

Basin Gulch Trail

Ends at Fuse Lake
Inside Deerlodge National Forest
1,857 ft of climbing

7.3 mi one way · 1,857 ft climb · Easy

Deerlodge National Forest · Camp 4 mi away

Pozega Lake

Ends at Big Pozega Lake
Inside Deerlodge National Forest
1,502 ft of climbing

3.2 mi one way · 1,502 ft climb · Easy

Deerlodge National Forest · Camp under a mile away

South Boulder Trail

Ends at Stewart Lake
Inside Deerlodge National Forest
1,799 ft of climbing

5.2 mi one way · 1,799 ft climb · Easy

Deerlodge National Forest · Camp 10 mi away

Green Lake

Ends at Green Lake
Inside Deerlodge National Forest
Camp 4 mi away

3.4 mi one way · 958 ft climb · Easy

Deerlodge National Forest · Camp 4 mi away

Signal

Cell coverage here

VerizonLTE · Poor
AT&TLTE · Poor
T-MobileLTE · Fair

FCC coverage data · signal varies in remote terrain

Weather

7-day forecast

Today62°43°Mostly Sunny
Fri53°41°Slight Chance Light Rain
Sat50°39°Light Rain
Sun57°41°Sunny
Mon59°42°Sunny
Tue59°42°Sunny
Wed59°40°Sunny

Today: Mostly Sunny then Chance Showers And Thunderstorms · wind 5 to 12 mph S

National Weather Service · refreshed hourly

More like this

Hikes that read like this one, wherever they are.

Sidney Lake Trail
- Ends at Sidney Lake
- Inside Deerlodge National Forest
0.1 mi one way · Easy
Deerlodge National Forest · Camp 7 mi away
Copper Lakes Trail
- Passes Dora Thorn LAke
- Inside Deerlodge National Forest
- 2,690 ft of climbing
6.7 mi one way · 2,690 ft climb · Easy
Deerlodge National Forest · Camp 7 mi away
Thorton Lake
- Ends at Thornton Lake
- Inside Deerlodge National Forest
- Camp 2 mi away
1.6 mi one way · 768 ft climb · Easy
Deerlodge National Forest · Camp 2 mi away
Doney Lake
- Ends at Doney Lake
- Inside Deerlodge National Forest
- Camp under a mile away
1.7 mi one way · 342 ft climb · Easy
Deerlodge National Forest · Camp under a mile away