Mammoth campground is a National Park campground near the northern entrance and is the only campground in Yellowstone that is open all year round. In May 2014 it was $20 a night (cash or credit card) with a maximum of 30 nights per year within Yellowstone NP. The sites are spacious and nearly all are pull throughs. We have a... More
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- Also Known As:
- Mammoth Campground Hotel Yellowstone National Park