Unit 700

Fort Peck Reservoir dominates the northern boundary and serves as a major reference point. The Musselshell and Missouri Rivers frame the unit's western and northern borders. Notable buttes scattered across the prairie—Castle Butte, Square Butte, Signal Butte, Buffalo Hill—provide both navigation landmarks and glassing vantages.

Several named bays indent the reservoir shoreline: Hell Creek Bay, Catfish Bay, Sturgeon Bay, and Snow Creek Bay offer water access and orientation. Major coulees and divides—the Sag, Hagen Gap, School Section Divide, Tripp Divide—create natural travel corridors. These features, while not dramatic, break the monotony and help hunters establish position in open country.

All terrain sits below 3,400 feet—low-elevation prairie and basin country with minimal elevation change across most of the unit. The landscape is primarily open grassland with sparse timber, broken by coulees, creek bottoms, and butte formations like Castle Butte, Square Butte, and the Piney Buttes. This is short-grass prairie and sagebrush country typical of Montana's Hi-Line region.

Riparian corridors along major drainages (Musselshell, Missouri, Lodgepole, Sage Hen creeks) support cottonwood and willow. The buttes and ridges—Hogs Back, Blue Ridge, White Horse Divide—rise as isolated features offering slight elevation gain and vantage points in otherwise gentle terrain.

Despite 1,090 miles of roads, accessibility is listed as limited—many roads are ranch tracks, ranch roads, or administrative routes rather than public thoroughfares. The vast size and sparse population (Brusett, Van Norman are tiny settlements) suggest low hunter density relative to area. Road density is low, favoring hunters willing to walk.

Staging from Mosby on State Route 200 (western boundary) or Malta to the north provides the most practical access. Most hunters likely focus on reservoir access points and main drainages, leaving extensive prairie and coulée country quieter. The straightforward terrain (complexity 3.8/10) means minimal navigation challenge but also minimal natural pressure relief.

Unit 700 occupies the drainage country between the Musselshell River on the west and the Fort Peck Reservoir and Missouri River system on the north and east. The unit spans portions of Garfield and McCone Counties in north-central Montana, anchored by the massive Fort Peck Reservoir. The western boundary follows State Route 200 from the Musselshell River Bridge near Mosby northeast to where the Musselshell joins the Missouri.

From there, the boundary traces the Missouri River east and north to the Fort Peck Powerhouse, then south along the reservoir's eastern shore to Big Dry Creek. The unit encompasses prairie, scattered buttes, and extensive drainage systems—roughly 1,090 miles of road infrastructure serving a vast, sparsely populated region.

Water is abundant, a major asset in this unit. Fort Peck Reservoir anchors the north and east; its numerous bays provide reliable access. The Musselshell and Missouri Rivers frame the unit's boundaries.

Interior drainages are extensive: Lodgepole Creek, Sage Hen Creek, Lost Creek, Kill Woman Creek, and Ghost Coulee form the primary flow systems. Multiple stock reservoirs—Mashesky, Fork, Jade, Mullory, Burgess, Cottonwood, Buffalo Hill, Stroud—dot the prairie. Springs are scattered throughout (School Section Spring, Biscuit Butte Spring, Herron Springs, Dripping Spring). This water abundance contrasts sharply with many prairie units and enables extended backcountry hunts without carrying heavy supplies.

Unit 700 is pronghorn country. The open, short-grass prairie with scattered buttes and coulees creates ideal conditions for long-range spotting and stalking. Hunt the ridges and butte tops—Castle Butte, Square Butte, Signal Butte—to glass open flats and drainage systems.

Water sources cluster around the reservoir, major creeks, and stock ponds; pronghorn pattern their movement around these. Early season offers the best access before wet weather complicates roads. The abundant water means animals can spread across the unit; focus on terrain breaks (coulees, ridges) where pronghorn funnel.

Late-season rut activity concentrates bucks near does. The sparse timber and open sight lines reward patient glassing over pushing game. Avoid the lowest, wettest areas in spring and early summer.