Thornton Lakes
Itinerary
Thornton Lakes Trailhead
4.5 mi • 2,500 ft gain
Thornton Lake Camp
4.5 mi • 400 ft gain
Thornton Lakes Trailhead
How to get a permit
This trip requires a North Cascades National Park Backcountry Permit. Reservations depend on your start date:
Dec
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Oct 13, 2024 – May 15, 2025
Unlimited number of permits available.1 option
A
In-person reservations
| Opens | Day of | 12 AM PT |
|---|---|---|
| Closes | Day of | 11:59 PM PT |
Permit details
Here is how to fill out the North Cascades National Park Backcountry Permit application:
| Starting Area | Short Trails |
|---|---|
| Campsite | Thornton Lake Camp |