Yes, it's a gas station. You can get gas, ice, and souvenirs. You can also order lobster taquitos, and their world famous fish tacos. Seriously good.
Place Category: National Parks
Established in 1911 by presidential proclamation, Devils Postpile National Monument protects and preserves the Devils Postpile formation, the 101-foot high Rainbow Falls, and pristine mountain scenery. The formation is a rare sight in the geologic world and ranks as one of the world’s finest examples of columnar basalt. Its columns tower 60 feet high and display an unusual symmetry. Read more…
Due to heavy snow load and the potential for flooding, the 20-site campground in Devils Postpile National Monument might be closed for the 2017 summer season. (source)