• Visitors stand on the boardwalk of Grand Prismatic, the park's largest hot spring which is ringed with orange, brown and yellow runoff channels.

    Yellowstone

    National Park ID,MT,WY

Post Offices in Yellowstone

There are Post Offices at the following locations:

  • Mammoth Hot Springs - Open year-around excluding holidays from 8:30 a.m. to 5:00 p.m. weekdays. Closed Saturday and Sunday.

  • Old Faithful - Open from early-May to late-October

  • Grant Village - Open from mid-May to mid-September

  • Lake Village - Open from mid-May to mid-October

  • Canyon Village - Open from late-May to mid-September

Did You Know?

Upper Geyser Basin Hydrothermal Features on a Winter Day.

Yellowstone contains approximately one-half of the world’s hydrothermal features. There are over 10,000 hydrothermal features, including over 300 geysers, in the park.