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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.

Leave it better than you found it.

Hike

Tolt Pipeline Trail

Near Radar Lake
1,620 ft of climbing

14.1 mi out & back · 1,620 ft gain · 534 ft high point · Hard

Via the Sammamish River Trail (0.3 mi)

Washington · OpenStreetMap contributors

About Elevation Highlights Map More hikes

About this hike

The Tolt Pipeline Trail is a 14.1-mile out and back route using Sammamish River Trail, climbing 1,620 feet near Radar Lake and Welcome Lake.

Elevation

1,620 ft of gain round trip.

More hikes nearby

Ranked the same way, within twenty-five miles.

17 mi from you
West Tiger RR Grade
- Summits West Tiger #3
- 3,969 ft of climbing
8.7 mi loop · 3,969 ft gain · Very hard
Washington
17 mi from you

Out: 910 ft up, returns the same way. Source: USGS 3DEP.

Highlights

What the trail reaches, measured from the start.

ViewpointNearby · 0.8 mi in
Welcome LakeNearby · 5.5 mi in
Radar LakeNearby · 6.3 mi in

Nearby reading

Cottage Lake, Washington

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: 14.1 mi
Shape: Out & back
Gain: 1,620 ft round trip
High point: 534 ft
Low point: 27 ft
Difficulty: HardFrom 14.1 mi and 1,620 ft of climbing
Managed by: OpenStreetMap contributors
State: Washington
Camps within 15 mi: 0
Trailhead: 47.7329° N · 122.1450° W

Get directions Open the map

Preston Trail

Summits West Tiger #1
2,423 ft of climbing

5.8 mi out & back · 2,423 ft gain · Hard

Washington

Mount Persis Trail

Summits Mount Persis
2,759 ft of climbing
Camp 5 mi away

3.5 mi out & back · 2,759 ft gain · Very hard

Washington · Camp 5 mi away

Rattlesnake Mountain Trail

Passes Rattlesnake Mountain - East Peak
Inside Snoqualmie National Forest
5,581 ft of climbing

15.9 mi out & back · 5,581 ft gain · Very hard

Snoqualmie National Forest · Camp 14 mi away

Seattle View Trail

Summits West Tiger #3
3,110 ft of climbing

5.1 mi out & back · 3,110 ft gain · Very hard

Washington

Little Si

Summits Little Si
1,417 ft of climbing

3.9 mi out & back · 1,417 ft gain · Moderate

Washington · Camp 10 mi away

More like this

Hikes that read like this one, wherever they are.

Pipeline Regional Trail
- Near Welcome Lake
4.7 mi out & back · 254 ft gain · Easy
Washington
Trillium Trail
- Near Welcome Lake
4.9 mi out & back · 694 ft gain · Moderate
Washington
Lake to Lake Trail
- Ends at Lake Sammamish
- 1,846 ft of climbing
17.6 mi out & back · 1,846 ft gain · Very hard
Washington
Sammamish River Trail
- Near Norway Hill
20.8 mi out & back · 418 ft gain · Hard
Washington

Weather

7-day forecast

Fri50°35°Light Rain
Sat53°36°Partly Sunny
Sun55°36°Partly Sunny
Mon55°42°Mostly Cloudy
Tue57°39°Partly Sunny
Wed58°42°Partly Sunny
Thu57°Chance Light Rain

Fri: Light Rain · wind 2 mph W

National Weather Service · refreshed hourly

Signal

Cell coverage here

VerizonLTE · Excellent
AT&TLTE · Excellent
T-Mobile5G · Excellent

FCC coverage data · signal varies in remote terrain