Whitetail Reservoir is a remote fishing access site located in Sheridan County in northeastern Montana, approximately 7 miles north of Flaxville on Highway 511. This small reservoir provides basic public water access in an area where such opportunities are limited. The FWP-managed site offers primitive facilities with a hand launch for watercraft and a vault toilet. Access for RVs and larger trailers is notably limited due to the approach roads and tight entrance at the cattle guard, with parking available for approximately 8 vehicles. The reservoir supports populations of Northern Pike and Yellow Perch, attracting anglers throughout the open water season and through the ice in winter.

The paddling environment at Whitetail Reservoir is characterized by its isolated prairie setting, far from major population centers. The surrounding landscape consists of typical eastern Montana shortgrass prairie, with expansive views under big sky country. Wildlife viewing opportunities include various waterfowl species, shorebirds, and raptors that utilize prairie wetlands. White-tailed deer, the reservoir's namesake, are common in the area.

Water levels can fluctuate significantly depending on precipitation and agricultural water demands, as is common with many reservoirs in this region. Paddlers should be prepared for variable conditions and limited amenities. The remote location means services are distant, so visitors should come prepared with adequate supplies, water, and sun protection. Wind is a significant factor on this exposed prairie reservoir, and afternoon winds can create challenging conditions for paddlers. Morning hours typically offer the calmest water.

The reservoir is open to fishing during established seasons with no weapons restrictions for hunting, reflecting its multiple-use management. This site appeals primarily to anglers and paddlers seeking solitude and a genuine prairie reservoir experience, rather than those looking for developed recreational facilities. The isolation and primitive character are part of the appeal for visitors comfortable with remote, self-sufficient outdoor recreation.