Unit HX-01

Hat Rock and Boat Rock (distinctive columnar formations) provide navigational anchors visible across miles of open country and serve as natural glassing points. Umatilla Butte dominates the southern skyline and helps orient hunters to terrain. The series of buttes—Finley, Saddle, Horn, Lone—form a subtle ridge system useful for navigation and vantage points.

Lake Umatilla and the Three Mile Falls Pool are major water features and logical gathering points. Smaller reservoirs like Cutsforth, Carty, and Cold Springs offer water access and represent secondary hunting zones. The Walla Walla River and Little Walla Walla provide drainage corridors worth following; irrigation canals are so extensive they essentially become landscape features.

The unit sits entirely below 2,200 feet, with most country between 500 and 1,200 feet elevation. There is no forest; the landscape is dominated by sagebrush plains, native grasslands, and agricultural fields. Vegetation patterns follow water availability—riparian corridors along the Columbia and major drainages support denser growth including willows and cottonwoods, while the uplands are sparse sagebrush interspersed with bunchgrass.

Isolated buttes (Umatilla, Finley, Saddle, Horn) rise 300-400 feet above the flats and break the monotony. Water sources—reservoirs, ponds, springs, and irrigated canals—create green belts that concentrate wildlife use in otherwise dry country.

Road density of 1.89 miles per square mile indicates a well-connected unit with consistent accessibility. Major highways (US-395, I-84 corridor) and secondary roads create a network allowing vehicle access to most areas. Small towns scattered around the unit's margins—Hermiston, Irrigon, Boardman—provide staging points and supply access.

Most hunting pressure concentrates along waterways and near population centers; the open terrain means that hunter dispersal is difficult and visible movement is common. However, the unit's vast size means that patient hunters can find less-crowded country by working away from obvious water sources and vehicle access points. Complexity is low, so navigation is straightforward but so is hunter conflict in tight areas.

HX-01 encompasses vast semi-arid plateau country in north-central Oregon, stretching roughly 40 miles east-to-west and 50 miles north-to-south. The Columbia River forms the northern boundary; the unit extends south into rolling sagebrush grasslands that gradually transition from irrigated valleys to drier plains. Several small towns—Hermiston, Irrigon, Boardman—sit along the margins and serve as access points.

The terrain is remarkably open and interconnected, with minimal elevation change across the entire unit. This is developed agricultural and range country, heavily modified by irrigation infrastructure, with only scattered public land amid predominantly private ownership.

Water is abundant and distributed across the unit, but concentrated in specific features. Lake Umatilla—a major Columbia River reservoir—dominates the north and supports substantial riparian habitat. Secondary reservoirs and pools (Cutsforth, Carty, White, Cold Springs, Willow Lake) are scattered throughout and create reliable water sources for wildlife.

Numerous springs (O'Brien, Strait, Well, Fruit, Cold Springs, Coyote) dot the landscape. The Walla Walla River system, though often running low in summer, provides persistent drainages. Irrigation canals—Westland, Stanfield Drain, U.S.B. Line, and others—crisscross the unit and create additional permanent water.

For hunters, water sources are predictable and accessible; understanding which springs and reservoirs hold water during hunting season is critical for locating deer.

Mule deer and white-tailed deer both inhabit this unit, with mule deer dominating the open sagebrush and whitetails favoring riparian zones. Early season, deer use elevated areas (buttes, ridges) where thermals keep them cooler and visibility is best; they descend to water sources and green feed in evening. The rut brings deer into more active movement, particularly along drainages where bucks can patrol multiple does.

Late season concentrates deer near reliable water and remaining green vegetation—reservoirs, springs, and irrigated areas become critical. Glassing from buttes and natural vantage points is effective across this open country. Hunting strategy shifts dramatically based on hunting pressure: during peak weekends, work distance from roads and concentrate on less-obvious water sources.

Riparian corridors and spring-fed valleys often hold deer that heavy pressure pushes away from reservoir areas.