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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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Mt. Thielsen

Hike

Mt. Thielsen

Ends at Lathrop Glacier
Inside Umpqua National Forest
4,043 ft of climbing

9.7 mi out & back · 4,043 ft gain · 9,159 ft high point · Very hard

In Umpqua National Forest · Oregon · U.S. Forest Service

About Elevation Highlights Map Camp near here More hikes

About this hike

This out and back trail climbs 4,043 feet to Mount Thielsen at 9,159 feet in Umpqua National Forest, reaching Lathrop Glacier.

Elevation

4,043 ft of gain round trip.

Camp near here

The closest places to sleep, measured from the trailhead.

See all on the map

0.9 mi from the trailhead
South Shore Pavilion
Campground · Oregon

More hikes nearby

Ranked the same way, within twenty-five miles.

22 mi from you
Union Peak Trail
- Summits Union Peak
- Inside Crater Lake National Park
- 1,852 ft of climbing
9.9 mi out & back · 1,852 ft gain · Hard
Crater Lake National Park · Camp under a mile away

Out: 3,850 ft up, returns the same way. Source: USGS 3DEP.

Highlights

What the trail reaches, measured from the start.

Lathrop GlacierDestination · 4.8 mi in
Diamond LakeNearby · 0.0 mi in

Nearby reading

Lathrop Glacier
Mount Thielsen

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. Photos: Wikimedia Commons contributors, licensed as shown on each photo. Download the trail and feature data.

At a glance

Length: 9.7 mi
Shape: Out & back
Gain: 4,043 ft round trip
High point: 9,159 ft
Low point: 5,393 ft
Difficulty: Very hardFrom 9.7 mi and 4,043 ft of climbing, with steep sections
Managed by: U.S. Forest Service
State: Oregon
Camps within 15 mi: 10
Trailhead: 43.1437° N · 122.1275° W

Get directions Open the map

1.1 mi from the trailhead

Diamond Lake

Campground · Oregon

1.2 mi from the trailhead

Broken Arrow Campground

Campground · Oregon

16 mi from you

Garfield Peak Trail

Summits Garfield Peak
Inside Crater Lake National Park
1,247 ft of climbing

3.3 mi out & back · 1,247 ft gain · Moderate

Crater Lake National Park · Camp 3 mi away

Watchman Peak Trail

Summits The Watchman
Inside Crater Lake National Park
Camp 4 mi away

3.4 mi out & back · 868 ft gain · Moderate

Crater Lake National Park · Camp 4 mi away

Mt. Bailey

Summits Mount Bailey
Inside Umpqua National Forest
3,282 ft of climbing

9.7 mi out & back · 3,282 ft gain · Very hard

Umpqua National Forest · Camp 1 mi away

Plaikni Falls Trail

Ends at Plaikni Falls
Inside Crater Lake National Park
Camp under a mile away

1.9 mi loop · 362 ft gain · Easy

Crater Lake National Park · Camp under a mile away

Crater Peak Trail

Summits Crater Peak
Inside Crater Lake National Park
1,276 ft of climbing

6.6 mi loop · 1,276 ft gain · Moderate

Crater Lake National Park · Camp 3 mi away

More like this

Hikes that read like this one, wherever they are.

Thielsen Creek
- Near Lathrop Glacier
- Inside Umpqua National Forest
- 1,623 ft of climbing
10.9 mi out & back · 1,623 ft gain · Hard
Umpqua National Forest · Camp 2 mi away
Twin Lakes
- Near Twin Lakes Mountain
- Inside Umpqua National Forest
- 1,013 ft of climbing
4.4 mi out & back · 1,013 ft gain · Moderate
Umpqua National Forest · Camp 5 mi away
Deception
- Inside Umpqua National Forest
- 1,088 ft of climbing
- Camp 3 mi away
3.4 mi out & back · 1,088 ft gain · Moderate
Umpqua National Forest · Camp 3 mi away
4wd Sultana Way
- Inside Umpqua National Forest
- 2,241 ft of climbing
- Camp 1 mi away
5.6 mi out & back · 2,241 ft gain · Hard
Umpqua National Forest · Camp 1 mi away

Signal

Cell coverage here

VerizonLTE · Poor
T-MobileLTE · Fair

FCC coverage data · signal varies in remote terrain

Weather

7-day forecast

Today40°28°Partly Sunny
Sat40°28°Light Rain Likely
Sun40°28°Mostly Sunny
Mon44°34°Partly Sunny
Tue45°33°Partly Sunny
Wed47°33°Mostly Sunny
Thu43°31°Chance Rain And Snow

Today: Partly Sunny · wind 6 to 12 mph SSW

National Weather Service · refreshed hourly