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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

Passes Dora Thorn LAke
Inside Deerlodge National Forest
3,021 ft of climbing

8.4 mi out & back · 3,021 ft gain · 8,623 ft high point · Hard

Via the Copper Lakes Trail (1.6 mi)

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

About Elevation Highlights Map Camp near here More hikes

About this hike

Sidney Trail uses Copper Lakes Trail to reach Sidney Lake on an 8.4-mile out and back route gaining 3,021 feet.

Elevation

3,021 ft of gain round trip.

Camp near here

The closest places to sleep, measured from the trailhead.

See all on the map

6.8 mi from the trailhead
Racetrack Cabin
Campground · Montana

More hikes nearby

Ranked the same way, within twenty-five miles.

16 mi from you
CDT - Idaho & Montana Section
- Ends at Upper Waterton Lake
- Inside Glacier National Park
- 188,201 ft of climbing
968.1 mi one way · 188,201 ft gain · Very hard
Glacier National Park

Out: 1,490 ft up, returns the same way. Source: USGS 3DEP.

Highlights

What the trail reaches, measured from the start.

Crystal LakeAlong the way · 0.9 mi in
Dora Thorn LAkeAlong the way · 1.6 mi in
Copper Creek LakesNearby · 1.0 mi in
Sidney LakeNearby · 2.1 mi in
Boulder LakesNearby · 2.8 mi in

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: 8.4 mi
Shape: Out & back
Gain: 3,021 ft round trip
High point: 8,623 ft
Low point: 7,509 ft
Difficulty: HardFrom 8.4 mi and 3,021 ft of climbing
Managed by: U.S. Forest Service
State: Montana
Camps within 15 mi: 8
Trailhead: 46.3334° N · 113.1599° W

Get directions Open the map

9.7 mi from the trailhead

Flint Creek Campground

Campground · Montana

10.0 mi from the trailhead

Lodgepole Campground (on Georgetown Lake, Montana)

Campground

7 mi from you

Trask Lakes

Ends at Alpine Lake
Inside Deerlodge National Forest
2,688 ft of climbing

11.9 mi out & back · 2,688 ft gain · Very hard

Deerlodge National Forest · Camp 4 mi away

Green Lake

Ends at Green Lake
Inside Deerlodge National Forest
1,473 ft of climbing

6.7 mi out & back · 1,473 ft gain · Hard

Deerlodge National Forest · Camp 4 mi away

Pozega Lake

Ends at Big Pozega Lake
Inside Deerlodge National Forest
1,639 ft of climbing

6.5 mi out & back · 1,639 ft gain · Hard

Deerlodge National Forest · Camp under a mile away

South Boulder Trail

Ends at Stewart Lake
Inside Deerlodge National Forest
2,216 ft of climbing

10.3 mi out & back · 2,216 ft gain · Hard

Deerlodge National Forest · Camp 7 mi away

Race Track Creek

Ends at Fisher Lake
Inside Deerlodge National Forest
1,296 ft of climbing

5.8 mi out & back · 1,296 ft gain · Moderate

Deerlodge National Forest · Camp 2 mi away

More like this

Hikes that read like this one, wherever they are.

Sidney Lake Trail
- Ends at Sidney Lake
- Inside Deerlodge National Forest
- 1,325 ft of climbing
4.1 mi out & back · 1,325 ft gain · Moderate
Deerlodge National Forest · Camp 7 mi away
Copper Lakes Trail
- Passes Dora Thorn LAke
- Inside Deerlodge National Forest
- 3,102 ft of climbing
13.2 mi out & back · 3,102 ft gain · Very hard
Deerlodge National Forest · Camp 7 mi away
Copper Lake Trail
- Ends at Copper Creek Lakes
- Inside Deerlodge National Forest
- 1,344 ft of climbing
4.8 mi out & back · 1,344 ft gain · Moderate
Deerlodge National Forest · Camp 7 mi away
Crystal Lake Trail
- Ends at Crystal Lake
- Inside Deerlodge National Forest
2.0 mi out & back · 778 ft gain · Moderate
Deerlodge National Forest · Camp 7 mi away

Signal

Cell coverage here

AT&TNo signal
T-MobileLTE · Fair

FCC coverage data · signal varies in remote terrain

Weather

7-day forecast

Tue39°24°Mostly Sunny
Wed37°24°Mostly Sunny
Thu34°22°Mostly Sunny
Fri35°26°Mostly Sunny
Sat39°31°Mostly Sunny
Sun44°31°Mostly Sunny
Mon41°Partly Sunny

Tue: Mostly Sunny · wind 1 to 9 mph S

National Weather Service · refreshed hourly