Thornton Lakes Trail
4.5 mi
Distance
446 ft
Elev. Gain
1h 44m
Est. Time
Point to Point
Route Type
Moderate
Difficulty
About This Trail
Thornton Lakes Trail is a point-to-point trail in North Cascades National Park, managed by the National Park Service, in Whatcom County, Washington. It is 4.5 miles long and gains 446 feet. The surface is dirt. Per OpenStreetMap contributors, it is closed to bikes and horses. The nearest town is Marblemount, Washington, about 10 miles away in a straight line.
From the trail data on this page. For conditions and closures, see official sources.
Trail Conditions
Trail Conditions
We have no current condition data for this trail. Check with the operator before you go, and submit a report below if you've been recently.
No recent condition reports. Be the first to share what you see on the trail.
Elevation Profile
| Point | Distance from start | Elevation |
|---|---|---|
| Start | 0.0 mi | 1,379 ft |
| High point | 0.4 mi | 1,519 ft |
| End | 4.5 mi | 764 ft |
Trail Details
- No bikes
- No horses
Bike and horse access: OpenStreetMap contributors, checked 2026-10-14. Rules change, so confirm with the land manager before you go.
- Route Type
- Point to Point
- Surface
- Dirt
Official sources & verification
Managed by National Park Service
Source of truth
- National Park Service unit page
Alerts, conditions, and the unit's plan-your-visit page.
Where it is
- Nearest town:
- Marblemount, WA · about 10 mi away
- County:
- Whatcom County, WA
- Jurisdiction:
- North Cascades National Park · National Park Service
Nearest town and county from U.S. Census Bureau place records and county boundaries.
Verify by phone or mail
- Operator:360-854-7200
- Address:810 State Route 20 · Sedro-Woolley, WA · 98284
Reviews
No reviews yet
Be the first to share your experience and help others plan their visit.
OpenStreetMap
Nearby Trails
More trails near Thornton Lakes Trail
In this park
Other trails in North Cascades National Park
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Stay nearby
Campgrounds near this trail
Goodell Creek Campground
2.9 mi awayRoss Lake National Recreation Area
Marblemount, WA
Check official pricing19 sitesReservable TentRV Well reviewed Some Coverage
UPPER GOODELL GROUP CAMPGROUND
3 mi awayRoss Lake National Recreation Area
Check official pricing1 sitesNational Park Reservable Tent
LOWER GOODELL GROUP CAMPGROUND
3 mi awayRoss Lake National Recreation Area
Check official pricing2 sitesNational Park Reservable
Newhalem Creek Campground
3.2 mi awayRoss Lake National Recreation Area
Marblemount, WA
Check official pricing108 sitesReservable TentRV Popular Some Coverage
NF Dispersed Camping
6.1 mi awayMt. Baker National Forest
Marblemount, WA
Pricing varies — check with the operatorDispersed
Gorge Lake Campground
8.5 mi awayRoss Lake National Recreation Area
Rockport, WA
Check official pricing8 sitesReservable TentRV Well reviewedBooks out · 100% No Service
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