Pros & cons
PROS
- Striking New Deal architecture with limestone bear sculptures
- Lobby open 24/7 for access
- Fun Yellowstone postmark for your postcards
CONS
- Closed on weekends
- No public restrooms in the building
- Limited services beyond basic mailing and postage
Overview
A quick, quirky stop in Mammoth: this historic post office blends everyday utility with genuine character. Pop in to mail a postcard and you’ll snag a Yellowstone postmark, then take a moment to admire the building’s period details and the two hefty bear cub sculptures guarding the entrance.
What Makes It Unique
Built in the late 1930s as part of a federal public-works push, the post office is designed in a French Renaissance Moderne style. Inside, the lobby is finished with handsome travertine, and outside, those three-ton Indiana limestone bear cubs give it real personality. It’s not a museum, but it feels like a little time capsule.
Services and Practicalities
- Counter hours run Monday–Friday, 8:30 am–5:00 pm; closed on federal holidays. The lobby is accessible 24/7.
- Expect basic mailing and postage; specialty services are limited here.
- There are no public restrooms in the building. Use the nearby Mammoth Hot Springs area facilities (hotel/village restrooms) instead.
- Parking is available right out front.
Where It Is
The post office sits in Mammoth, just north of the Albright Visitor Center, making it an easy add-on when you’re fueling up, grabbing a bite, or touring the terraces.
Wildlife Notes
Elk routinely wander through Mammoth, sometimes lounging right on the lawns near public buildings. Give them plenty of space and never approach for photos.
Best Time to Visit
- For errands: Weekdays mid-morning or mid-afternoon to dodge opening/closing rushes.
- For photos: Soft morning or late-day light flatters the limestone bears and facade.
- If you only want a peek: The lobby is open around the clock, even when the counter is closed.
Where it is
44.9770, -110.6989Tips for Mammoth Springs Post Office
- 01Send a postcard to get the Yellowstone postmark.
- 02Plan weekday visits; the counter is closed on weekends.
- 03Use Mammoth area restrooms nearby—the post office has none.
- 04Photograph the limestone bear cubs flanking the entrance.
- 05Lobby stays open 24/7 for quick in-and-out access.
Amenities
Near Mammoth Springs Post Office
All places →All trails →
0 mi awayAlbright Visitor CenterHistoric year‑round hub for exhibits, permits, and ranger intelVisitor Center · Exhibit
0.1 mi awayAlbright Picnic AreaSmall picnic lawn on Fort Yellowstone’s historic parade groundsPicnic Table · Restroom
0.1 mi awayFort YellowstoneHistoric Army post with sandstone buildings and an easy walking tourRestroom · Exhibit
0.1 mi awayMammoth Hot Springs HotelHistoric in-park base steps from the terraces, with winter tour perksRestaurant · Food
0.4 mi awaySepulcher Mountain TrailSteep summit loop with huge Yellowstone views and real solitudeChallenging · 11 mi · 7 hr
0.4 mi awayMammoth Hot Springs Lower Terrace BoardwalkShort, ever-changing travertine terraces with big payoff fastEasy · 0.8 mi · 45 min
0.4 mi awayMammoth TerracesStair-filled boardwalks through ever-changing travertine sculpturesEasy · 2.5 mi · 1.5 hr
0.4 mi awayBeaver Ponds Loop TrailWildlife-rich loop from Mammoth to serene ponds and ridge viewsModerate · 5.6 mi · 2.4 hr
