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:
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Jan
Feb
Mar
Oct 8, 2023 – May 16, 2024
Unlimited number of permits available.1 option
A
In-person reservations
| Opens | Day of | 12 AM PT |
|---|---|---|
| Closes | Day of | 11:59 PM PT |
Don’t want to miss the deadline?
Let us know when you want to go and we’ll remind you to book.
Permit details
Here is how to fill out the North Cascades National Park Backcountry Permit application:
| Starting Area | Short Trails |
|---|---|
| Campsite | Thornton Lake Camp |