Montana Low Cost Spay/Neuter Locations:

Statewide:
Montana Spay 
Spay Montana Mobile Clinic

Cascade County:
Cascades Humane Society Snap Program - Great Falls

Hill County:
Kitty Keepers - Havre

Flathead County:
The Flathead Spay & Neuter Task Force - Columbia Falls

Lake County:
Mission Valley Animal Shelter - Polson

Missoula County:
Humane Society Of Western Montana - Missoula

Ravalli County:
Fox Hollow Animal Project - Hamilton 

Silver Bow County:
Butte Spay Neuter Taskforce - Butte

Stillwater County:
Animaldoc PC - Absarokee
Stillwater Veterinary Clinic - Absarokee