FAS Big Rock Fishing Access Site

Special Notices & Closures 

  1. Stage II Fire Restriction Stage II Fire Restrictions: Effective July 3 for Sweet Grass County. The following acts are prohibited until further notice: 1. Building, maintaining, attending, or using a fire or campfire. 2. Smoking, except within an enclosed vehicle or building, a developed recreation site or while stopped in an area at least three feet in diameter that is barren or cleared of all flammable materials. The following acts are prohibited from 1:00 p.m. to 1:00 a.m.: 1. Operating any internal combustion engine. 2. Welding, or operating acetylene or other torch with open flame. 3. Using an explosive. (A patrol is required for two hours following cessation of all activities as identified in #3 above.) 4. Operating motorized vehicles off designated roads and trails.
  2. 07/03/2021 - 

    Until further notice

Region 5
Waterbody: Boulder River
Latitude/Longitude: 45.79293 -109.96446
Size: 75.8 acres
Elevation: 4,208 ft
Open: Jan 1 to Dec 31
I-90 exit 470 and drive into Big Timber 1.4 miles on Old Bridger Road. Turn south and continue 3.5 miles.

 Location Map

  1. Vehicle Length Trailer Length is 20ft.
  2. Stay Limit Maximum stay of 7 days

No Site Fees.

Hand Launch
ADA Accessibility
Difficult Accessibility