The Midland Ranch Unit 4: The Reservoir & Sublette Flat Ranch

Open Range, River Corridors, and a Historic Crossing

The Reservoir & Sublette Flat Ranch combines approximately 1,980 deeded acres with extensive state and BLM grazing resources. Open sagebrush country, miles of Big Sandy River frontage, and approximately ten miles of Big Sandy Reservoir shoreline across the unit’s mixed land tenure define its landscape.

This unit has a prominent place in Midland’s conservation story. The accompanying maps show its relationship to the Sublette pronghorn corridor and sage grouse core areas. Seasonal wildlife movements, resident game, and the concentration of birds along the river and reservoir bring ecological interest to a large working grazing operation.

Eight fenced grazing blocks, independent water supplies, and established livestock handling facilities support agricultural use. Water resources include historic surface rights, artesian and pump wells, springs, and 344 acre-feet of storage in the John Arambel Reservoir.

The Big Sandy River and Pulley Place river frontage provide fishing opportunities, while the reservoir and adjoining wet ground support waterfowl and sandhill cranes.

The property also preserves tangible evidence of western migration and settlement. The Sublette Cutoff river ford, emigrant carvings, remnants of a cavalry station, and other historic features connect the present-day ranch to the Oregon Trail era. Working range, wildlife movement, and human history remain closely interwoven here.

The Midland Ranch Unit 4: The Reservoir & Sublette Flat Ranch is a distinct and remarkable property offered for individual sale. Prospective buyers should be aware that it is also a key component of the legendary Midland Ranch, a legacy-scale holding of over one million acres which is being offered in its entirety. This larger portfolio represents a complete, year-round operation stretching from the timbered high country to the arid expanse of the Red Desert, encompassing world-class water rights, wildlife resources, and historical significance. While each unit stands powerfully on its own merits, the opportunity to acquire the complete Midland Ranch is a singular event in the western ranch market.