Mammoth Spring State Park
- Status
- Status not posted
- Entrance fee
- Not posted
- Day-use reservations
- None mentioned
- Dogs
- Not stated — check with park
- Camping
- None listed
- Official site
- arkansas.com(870) 625-7364
Official page last checked Oct 29, 2026. How we keep this current
Overview
Covering about 61 acres, Mammoth Spring State Park lies in Fulton County, in Thayer.
Hours
Park, gate, office and facility hours are listed separately because they often differ. Alerts above override normal hours.
| Facility | Days | Hours | Season |
|---|---|---|---|
| Visitor center | Daily | 8 a.m. – 5 p.m. | — |
| Visitor center | Train Depot and Museum: The Train Depot Museum will be closed from December 14 and reopens March 1 | ||
| Visitor center — Hours for the rest of the year | Wed–Sat | 8 a.m. – 5 p.m. | — |
| Sun | 1 p.m. – 5 p.m. | — | |
| Mon, Tue | Closed | — | |
Official wording
Visitor Center: Open daily 8 a.m. to 5 p.m. Closed New Year’s Day, Thanksgiving Day, Christmas Eve and Christmas Day.
Train Depot and Museum: The Train Depot Museum will be closed from December 14 and reopens March 1
Hours for the rest of the year: Wednesday-Saturday 8 a.m.-5 p.m. Sunday 1 p.m.-5 p.m. Closed Mondays and Tuesdays (except for Memorial Day, Labor Day and Fourth of July when required) Closed New Year’s Day, Thanksgiving Day, Christmas Eve and Christmas Day.
Source: official park page, checked Oct 29, 2026. Times are local to the park (America/Chicago).
Reservations
- Day use
- No day-use reservation requirement mentioned
- Booking system
- Arkansas State Parks reservations (reserve.arkansasstateparks.com)
We link to the official booking system rather than showing live availability, which changes minute to minute.
Amenities
Facilities
- Group facilities
✓ listed by the park · ✕ the park says it is not available. Anything not shown here isn’t mentioned by the official source — that means unknown, not unavailable.
Getting there
- Address
- 17 Highway 63 North
Mammoth Spring, AR 72554 - Nearest town
- Thayer
- Coordinates
- 36.4958, -91.5350
- Phone
- (870) 625-7364
- mammothspring@arkansas.com
Nearby state parks
Sources and freshness
- Arkansas State Parks — park page — last checked Oct 29, 2026
- Arkansas State Parks park map (Leaflet features in drupalSettings)
- Wikidata
- USGS PAD-US 4.1 (boundary and acreage)
“Last checked” is when our system last read the official source. No change has been detected since this page was first published. Hours, fees and rules can change without notice — confirm with the park before you go. Methodology