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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

Trillium Trail

Near Welcome Lake

4.9 mi out & back · 694 ft gain · 534 ft high point · Moderate

Via the Pipeline Regional Trail and the PSE Trail (0.7 mi)

Washington · OpenStreetMap contributors

About Elevation Highlights Map More hikes

About this hike

The Trillium Trail is a 4.9-mile out and back route using Pipeline Regional Trail and PSE Trail, climbing 694 feet near Welcome Lake.

Elevation

694 ft of gain round trip.

More hikes nearby

Ranked the same way, within twenty-five miles.

23 mi from you
Lake Serene Trail
- Ends at Logjam Falls
- Inside Snoqualmie National Forest
- 2,959 ft of climbing
6.7 mi out & back · 2,959 ft gain · Very hard
Snoqualmie National Forest · Camp 2 mi away

Out: 170 ft up, returns the same way. Source: USGS 3DEP.

Highlights

What the trail reaches, measured from the start.

ViewpointNearby · 2.0 mi in
Welcome LakeNearby · 2.5 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: 4.9 mi
Shape: Out & back
Gain: 694 ft round trip
High point: 534 ft
Low point: 346 ft
Difficulty: ModerateFrom 4.9 mi and 694 ft of climbing
Managed by: OpenStreetMap contributors
State: Washington
Camps within 15 mi: 0
Trailhead: 47.6943° N · 122.0468° W

Get directions Open the map

24 mi from you

Mailbox Peak Trail

Summits Mailbox Peak
4,833 ft of climbing

10.1 mi out & back · 4,833 ft gain · Very hard

Washington · Camp 7 mi away

Mount Teneriffe Trail

Summits Mount Teneriffe
4,853 ft of climbing

12.9 mi out & back · 4,853 ft gain · Very hard

Washington · Camp 9 mi away

Bridal Veil Falls Trail

Ends at a waterfall
Inside Snoqualmie National Forest
1,392 ft of climbing

3.8 mi out & back · 1,392 ft gain · Moderate

Snoqualmie National Forest · Camp 2 mi away

Mailbox Peak Old Trail

Summits Mailbox Peak
4,006 ft of climbing

4.9 mi out & back · 4,006 ft gain · Very hard

Washington · Camp 7 mi away

West Tiger RR Grade

Summits West Tiger #3
3,969 ft of climbing

8.7 mi loop · 3,969 ft gain · Very hard

Washington

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 a viewpoint
3.7 mi loop · 246 ft gain · Easy
Washington
Old Pond Trail
- Near a viewpoint
5.5 mi out & back · 680 ft gain · Moderate
Washington
Tolt Pipeline Trail
- Near Radar Lake
- 1,620 ft of climbing
14.1 mi out & back · 1,620 ft gain · Hard
Washington

Weather

7-day forecast

Today54°38°Patchy Fog
Sun52°36°Patchy Fog
Mon54°44°Partly Sunny
Tue56°42°Mostly Cloudy
Wed56°46°Chance Light Rain
Thu56°46°Chance Light Rain
Fri54°43°Light Rain Likely

Today: Patchy Fog then Mostly Sunny · wind 2 mph N

National Weather Service · refreshed hourly

Signal

Cell coverage here

VerizonLTE · Fair
AT&T5G · Good
T-Mobile5G · Good

FCC coverage data · signal varies in remote terrain