Mammoth Crest Loop
Itinerary
Duck Lake Pass Trailhead
5.4 mi • 2,100 ft gain
Deer Lakes
7.3 mi • 900 ft gain
Duck Lake Pass Trailhead
How to get a permit
This trip requires a Inyo National Forest Wilderness Permit. Reservations depend on your start date:
Dec
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Nov 2, 2024 – Apr 30, 2025
Unlimited number of permits available.1 option
A
Online reservations
| Opens | 2 weeks ahead | 7 AM PT |
|---|---|---|
| Closes | Day of | 11:59 PM PT |
Last-minute release: 2 weeks ahead at 7 AM PT
Permit details
Here is how to fill out the Inyo National Forest Wilderness Permit application:
| Permit Type | Overnight |
|---|---|
| Entry Point | Deer Lakes |
| Exit Point | Deer Lakes |
| 1st night Camp Area | Deer Lakes |