Mammoth Campground Reservations, Map & Guide

Plan Mammoth Campground reservations with year-round access, seasonal booking rules, RV limits, amenities, and official booking links.

Source checked July 23, 2026

Availability & Official Booking

Availability has not been verified. Check the official provider for your dates.

Reservations are required from April 15 through October 14. Limited winter camping is first-come, first-served from October 15 through April 1.

Mammoth Campground is near Mammoth Hot Springs and the north entrance. Winter weather can affect roads, services, and usable site dimensions.

Campground Specification	Details
Total Campsites	82 sites
Max RV / Trailer Length	45 feet
Elevation	6,200 feet
Cellular Coverage	Some Signal
Price Per Night	$25.00
Booking Window	Reservations are required from April 15 through October 14. Limited winter camping is first-come, first-served from October 15 through April 1.
Reservation Portal	Recreation.gov ↗

Cell coverage is a planning estimate, not a carrier guarantee. Terrain, weather, congestion, and carrier equipment can change reception.

The 82-site campground has flush toilets, potable water, food-storage lockers, seasonal hosts, and no showers or utility hookups.

Confirm accessible campsite features and which restrooms and services are operating for your travel dates.

Mammoth Hot Springs terraces, Fort Yellowstone, Gardiner, the Gardner River, and northern-range wildlife viewing.

How do I reserve Mammoth Campground?

Reservations are required from April 15 through October 14. Limited winter camping is first-come, first-served from October 15 through April 1.

What size RV fits at Mammoth Campground?

The published equipment limit is 45 feet. Individual sites can have smaller limits, so match the exact equipment dimensions on the booking page.

Is ParkWatch the official booking website?

No. ParkWatch is an independent comparison and availability aid. Complete reservations only through the official park-authorized provider.