Unit 101
High plains grassland and agricultural country between Wray and the Kansas border.
Hunter's Brief
GMU 101 is open plains terrain in northeastern Colorado, spanning the border country between Washington and Yuma counties. Elevation stays low and consistent across rolling prairie and scattered agricultural land with limited tree cover. The area is well-connected by county roads and highways, with access straightforward throughout. Water is limited but small reservoirs and creeks provide scattered opportunities. Hunting pressure remains manageable in this expansive but accessible grassland.
- Compact: under 200 sq mi
- Moderate: 200 - 800 sq mi
- Vast: over 800 sq mi
- Few: under 25%
- Some: 25 - 60%
- Most: over 60%
- Limited: under 0.7 mi/mi² (backcountry)
- Fair: 0.7 - 1.5 mi/mi²
- Connected: over 1.5 mi/mi² (well-roaded)
- Flat: under 20% mountains
- Rolling: 20 - 55%
- Steep: over 55%
- Sparse: under 20%
- Moderate: 20 - 50%
- Dense: over 50%
- Limited: under 0.3% area
- Moderate: 0.3 - 2% area
- Abundant: over 2% area
Hunt Schedule
27 huntsTerrain Deep Dive
Landmarks & Navigation
Mount Yuma provides the most recognizable landmark for orientation in otherwise featureless plains. Small reservoirs including Wray Watershed District Reservoirs 5 and 6 mark water sources and potential hunting focus areas. Hell Creek, Jack Creek, and Brunker Creek offer drainage corridors for navigation and water access, with Snyder Lake providing additional orientation.
These scattered features become navigation anchors in country where long-distance glassing dominates hunting approach—few major terrain features break the horizon.
Elevation & Habitat
Terrain stays between 3,500 and 4,600 feet across the entire unit, creating consistent high plains conditions without elevation-driven habitat transitions. The landscape is predominantly open grassland and prairie, with minimal forest cover scattered as shelter belts or cottonwood drainages. Sagebrush and short grass dominate; what trees exist cluster along creeks or as windbreaks around ranch operations.
This is classic Great Plains country—vast, treeless expanses interrupted by agricultural development and the occasional creek bottom.
Access & Pressure
The unit benefits from over 900 miles of roads with good connectivity via highways and county routes, making it accessible year-round and from multiple directions. U.S. 34, U.S. 36, and Colorado 61 provide major entry points; county roads allow hunters to stage from towns like Wray or Otis. Road density supports easy movement, but also enables vehicle pressure.
The terrain complexity is low, meaning hunters unfamiliar with the country can still navigate effectively, though solitude requires moving away from obvious access corridors.
Boundaries & Context
GMU 101 occupies northeastern Colorado's high plains, bounded by U.S. 34 on the north, U.S. 36 on the south, Colorado 61 on the west, and the Kansas border's eastern edge marked by Colorado 59 and county roads. The unit spans Washington and Yuma counties, encompassing towns including Otis, Calhoun, and Wray. This is ranch and agricultural country—open prairie interspersed with grain fields and pasture.
The landscape is straightforward and unbroken by major geographic features, making it fundamentally different from Colorado's mountain terrain.
Water & Drainages
Water is limited but strategically important. Creeks including Hell, Jack, and Brunker drain the unit year-round but flow inconsistently; some sections dry seasonally. Small reservoirs near Wray provide more reliable water for livestock and wildlife, making them natural hunting focal points.
Snyder Lake offers additional surface water. The sparse water distribution means successful hunting often centers on identifying reliable sources—wildlife congregates where water persists, particularly during dry periods.
Hunting Strategy
GMU 101 supports mule deer, white-tailed deer, pronghorn, and occasional elk and moose from populations in surrounding areas. The open grassland favors pronghorn and mule deer, which use prairie breaks and creek bottoms for cover. Early season hunting capitalizes on animals in open country before hunting pressure builds; mid-season shifts focus to creeks and sparse tree cover where animals seek refuge.
Late season often concentrates hunting near water sources and any remaining green vegetation. Mountain lion and bear are present but rarely primary targets. Glassing from distance across open country is more effective than timber work.
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?Historical normals, not a forecast
Built from 10 years of NASA POWER data (MERRA-2 satellite reanalysis) at this unit's location.
Temperatures and conditions below reflect the unit's dominant elevation band (4100 ft — 100% of unit area).
For elevation-by-elevation detail and live planning tools, use the TAGZ app.
- Daytime high / Overnight low — median daily maximum and minimum for each day of the year.
- Shaded band — the 10th–90th percentile spread across years.
- Freeze line — 32 °F reference for frost & snow risk.
Year-round temperature
Moon phase
?Illumination for each night of the selected two weeks, computed from lunar ephemeris. New and full moons are emphasised — useful for planning around moonlight.Typical conditions
?A snapshot of the selected two weeks, from long-run daily normals at the unit's dominant elevation.
- Day / night — median daytime high & overnight low; the sub-line is the typical 10th–90th percentile spread across years.
- Wet days — days with measurable precipitation (≥ 1 mm, WMO standard). Not a forecast.