Montana Fish Wildlife and Parks describes the Gallatin River as about twelve miles long from its origin at the confluence of the West and East Gallatin rivers to Three Forks, Montana, where it joins the Jefferson and Madison rivers to form the Missouri River. The river flows through a narrow valley consisting of agricultural and grazing lands at elevations less than 5,000 feet. The banks are primarily undercut, and long, deep pools provide much of the fish cover. Except for the East and West Gallatin rivers, tributaries to the Gallatin River are limited to a few spring creeks. Water can be slightly turbid year-round due to the sediment input from the East Gallatin. The Gallatin River below the confluence of its forks suffers from sedimentation, warm water temperatures, dewatering, and the presence of M. cerebralis, the causative agent of whirling disease. Trout populations decline in the lower river due to these factors and a variety of other cumulative impacts.Total Length: 97 miles FWP Region: Region 3Fishing District: Central Fishing DistrictGame Fish Opportunities: Brown Trout, Mountain Whitefish, Rainbow TroutAll Species Present: Brook Trout, Brown Trout, Longnose Dace, Longnose Sucker, Mottled Sculpin, Mountain Sucker, Mountain Whitefish, Rainbow Trout, White Sucker, Whitefish, Yellowstone Cutthroat Trout NOTE: There may be game fish present (including Species of Concern) that are not listed in the game fish category due to low numbers for that fish. Until you identify your catch, please handle all fish carefully. Thank you.Fishing Access Sites include:Kirk Wildlife Refuge: River Mile 46Axtell Bridge: River Mile 37Shed's Bridge: River Mile 33Cameron Bridge: River Mile 27Erwin Bridge: River Mile 24Four Corners: River Mile 16Gallatin Forks: River Mile 13NOTE: All river Fishing Access Sites (FAS) are listed in descending order by river mile from headwaters to mouth. The mouth of a stream is its confluence with another body of water and is considered mile 0.For additional information including Montana fishing regulations and licenses please see Montana Fish Wildlife and Parks website.