Unit 66A

Grays Lake anchors the western portion and serves as both a landmark and water source for hunters working that country. The Caribou Range spine forms the eastern boundary and provides high-point glassing opportunities from summits like Bald Mountain and Caribou Mountain. Clarks Cut offers a natural travel corridor through the higher ridges.

Major creeks—East Fork Fish Creek, North Fork Trout Creek, Hell Creek, and Jensen Creek—run north-south and function as navigation aids and water sources. These drainages compartmentalize the unit into distinct hunting zones accessible from different staging points.

Terrain spans from river-level bottomland near 5,600 feet to high ridges topping 9,700 feet, with the majority of huntable country in the 6,500 to 8,500-foot band. Lower elevations feature sagebrush parks and mountain mahogany slopes with scattered ponderosa and Douglas-fir; mid-elevations transition into lodgepole pine and aspen stands; higher country above 8,500 feet opens into subalpine parks and ridgeline terrain. The moderate forest coverage means the unit balances open glassing country and benches with timbered drainages, creating diverse habitat structure.

Morgan Meadow and other park systems offer productive early and late-season hunting zones.

Nearly 400 miles of forest roads penetrate the unit, providing solid connectivity and moderate access pressure. Road density is sufficient to reach multiple elevations and drainages without extensive foot travel, making this unit accessible to various hunter capability levels. Most pressure concentrates along the main roads and popular creek corridors; quieter country exists in the higher ridge systems and side drainages requiring more foot traffic.

Proximity to towns like Montpelier and Paris suggests this unit sees predictable pressure—mid-unit and off-main-road locations offer solitude potential.

Unit 66A occupies the western Caribou Range foothills in Bonneville and Caribou counties, bounded on the south by the South Fork of the Snake River and State Highway 34, with the Idaho-Wyoming state line forming the eastern edge. The unit stretches north from the river valley across rolling sagebrush benches into the higher Caribou Range country, encompassing a moderate-sized area that sits in the transitional zone between low-elevation ranch land and true mountain terrain. The landscape bridges the gap between Snake River Plain to the south and the higher peaks of the Caribou Range, making it a natural corridor for seasonal wildlife movement.

Water is limited and seasonally variable. Grays Lake provides reliable water on the western side, but much of the unit depends on spring-fed creeks that may dwindle by late season. Jensen Creek, Hell Creek, and the Fish Creek drainages offer the most consistent water, especially in higher terrain.

Willow Creek and Trail Creek add capacity in their respective valleys. Hunters should plan water strategy carefully—early season offers better conditions in high country, while lower drainage bottoms hold water longer. The South Fork of the Snake River borders the unit but is often not practical for hunting access.

Unit 66A works for elk, mule deer, and pronghorn depending on season and location. Early season hunters should focus on high parks and ridgelines where cooler temperatures push animals to elevation; mid-elevation timber pockets harbor deer. Rut period concentrates animals in mixed timber-meadow zones around 7,500 to 8,500 feet.

Late season pushes game toward lower sagebrush and valley country as snow accumulates above. The rolling terrain rewards glassing from high benches and ridgelines; use creeks as travel corridors to access different drainage systems. Early mornings on open slopes and evenings in timber transitions offer the best opportunity.

Water scarcity may concentrate animals on creek systems during dry stretches.