Mammoth Spring National Fish Hatchery

10/15/2026

🍂 As temperatures begin to cool and summer activities start winding down, work at Mammoth Spring National Fish Hatchery continues full speed ahead. Fish still need to be fed, cared for, sorted, and moved throughout the year!
🐟 Recently, hatchery staff spent time moving and weighing Rainbow Trout. But how do you count thousands of fish without counting each one individually?
The answer is MATH! We weigh and count several random samples to determine an average weight per fish. Once we have that information, we can weigh the rest of the fish as they're moved and calculate how many there are. This method is accurate, efficient, and saves a tremendous amount of time and resources.
So, the next time someone asks, "When am I ever going to use math?" tell them it's helping us manage thousands of Rainbow Trout right here at the hatchery!

10/05/2026

🚨 IMMEDIATE NEED FOR VOLUNTEERS! 🚨
Mammoth Spring National Fish Hatchery
We’re looking for helping hands right now to support Mammoth Spring National Fish Hatchery. Whether you love nature, enjoy interacting with visitors, or just want to give back to your community, we could really use your support.
-All skill levels welcome
-Flexible tasks based on your comfort and abilities
-Help us continue providing fun, educational, and conservation focused experiences for visitors of all ages.
If you're available and willing to pitch in, please reach out as soon as possible!
-870 625 3912
-302 Fish Hatchery Lane, Mammoth Spring, AR
-Follow one of the following links below to view and apply to the position.

https://www.volunteer.gov/s/volunteer-opportunity/a09SJ00000RiGG1YAN/mammoth-spring-national-fish-hatchery

https://www.volunteer.gov/s/volunteer-opportunity/a09SJ00000RiFdJYAV/mammoth-spring-national-fish-hatchery

Thank you for supporting conservation, education, and your local Hatchery community!

10/01/2026

Congratulations to our Winners from Fish Fest 2026🎉👏

10/01/2026

Fish Fest 2026 was truly one of our most enjoyable events yet. Attendees filled the day with laughter and excitement, reeling in fish after fish and making lasting memories. The atmosphere was vibrant, and it was clear that everyone was having a wonderful time.

We’ve begun uploading photos to the Fish Fest 2026 album, capturing the spirit of the day. Stay tuned—more images will be added as we continue to sort through the collection.

A heartfelt thank you goes out to all the dedicated volunteers and organizations who made this event possible. Special appreciation to the Friends of Mammoth Spring National Fish Hatchery, Mammoth Spring State Park, Arkansas Game and Fish, Mammoth Spring Beta Club, Mammoth Spring School District, Mammoth Spring Art Department, Fernweh Fly Co, our local volunteers, and everyone else who contributed to making Fish Fest 2026 spectacular.

Your enthusiasm and support are what make events like this so special. We look forward to seeing everyone again next year!

Follow the link below to see the phots. Don't forget to check the album regularly as photos will continue to be added.
https://www.facebook.com/media/set/?set=a.1514183364077337&type=3

10/01/2026

09/24/2026

Fish Fest at Mammoth Spring National Fish Hatchery!
September 26th from 9AM to 1PM
Join us for a day of fishing fun at the Aquatic Conservation Center!
Who Can Fish:
• Fishing is open to those 15 years old and younger.
What to Bring:
• Your own fishing gear
• Bait (worms are the only live bait allowed)
• Bucket or cooler for your catch
• A comfortable chair
Rules & Limits:
• Catfish take limit: 3 per person
• NO LIVE BAIT except worms—help us protect our fishery!
• For the safety and comfort of all attendees, pets and emotional support animals are not permitted at Fish Fest.
• Please be respectful to everyone in attendance.
Location:
302 Fish Hatchery Ln, Mammoth Spring, AR 72554
Questions?
Call 870-625-3912 for more information.
Enjoy a great day outdoors, follow the guidelines, and help conserve our local fish population. We look forward to seeing you at Fish Fest!

09/17/2026

Don't forget to stop by the Cast-a-line giftshop on your next trip to the Hatchery! Our Friends of the Mammoth Spring National Fish Hatchery are proud to offer so many locally made/made in the USA products, including these beautiful mugs from Wolf Creek Pottery, from right down the road in Hardy, AR!

09/11/2026

Starting Monday, September 14th, Mammoth Spring National Fish Hatchery's winter hours will begin.
• Monday–Friday: 8AM–4PM
• Saturday: 9AM–4PM
• Sunday: Closed

09/10/2026

Fish Fest at Mammoth Spring National Fish Hatchery!
September 26th from 9AM to 1PM
Join us for a day of fishing fun at the Aquatic Conservation Center!
Who Can Fish:
• Fishing is open to those 15 years old and younger.
What to Bring:
• Your own fishing gear
• Bait (worms are the only live bait allowed)
• Bucket or cooler for your catch
• A comfortable chair
Rules & Limits:
• Catfish take limit: 3 per person
• NO LIVE BAIT except worms—help us protect our fishery!
• For the safety and comfort of all attendees, pets and emotional support animals are not permitted at Fish Fest.
• Please be respectful to everyone in attendance.
Location:
302 Fish Hatchery Ln, Mammoth Spring, AR 72554
Questions?
Call 870-625-3912 for more information.
Enjoy a great day outdoors, follow the guidelines, and help conserve our local fish population. We look forward to seeing you at Fish Fest!