Unit S75 (Main Canyon)
Colorado Hunting Guide — Bighorn Sheep
Unit S75 lies in Mesa, Garfield and Rio Blanco counties. CPW bounds it by Colorado River-White River divide and Roan Creek- Parachute Creek divide among others. CPW's harvest estimates put bighorn sheep success here as high as 100%. Federal land covers about 45% of it. Check land status on a current map before you plan a route.
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Bighorn Sheep Hunting in Unit S75
Unit S75 lies in Mesa, Garfield and Rio Blanco counties. CPW bounds it by Colorado River-White River divide and Roan Creek- Parachute Creek divide among others. CPW's harvest estimates put bighorn sheep success here as high as 100%. Federal land covers about 45% of it. Check land status on a current map before you plan a route.
Where to Find Bighorn Sheep in Unit S75
CPW's material on unit S75 stops at the boundary — there is no agency account of where its bighorn sheep live. So the ground below is the unit's own and the read on where to start is ours, labelled as such. The unit lies in Mesa, Garfield and Rio Blanco counties.
The lines of the unit: Colorado River-White River divide, Roan Creek- Parachute Creek divide and Kelly Gulch
CPW has unit S75 bounded on the north by Colorado River-White River divide; on the east by Roan Creek- Parachute Creek divide and Kelly Gulch; on the south by Colorado River; on the west by Bookcliffs, Little Salt Wash-Roan Creek divide, Big Salt Wash-Roan Creek divide and East Salt Creek-Roan Creek divide. That is a legal description, not a habitat map. What it does give you is the way in: the rivers and highways you cross, and the divides that decide which drainage you end up in.
High ground inside the line: Upper 4A Mountain, Brush Mountain and Horse Ridge
Named high points inside the unit include Upper 4A Mountain at 8,963 feet, Brush Mountain at 8,892 feet, Horse Ridge at 8,804 feet, Chimney Rock Point at 8,742 feet and 4A Ridge at 8,668 feet. Several carry a public-land flag in our data, which makes them the first places to try for a view. Sheep on lower country still need rock, and on a desert unit the rock is the whole hunt.
Holding ground: Sawmill Gulch, Indian Park and Pole Bridge Canyon
Below them sit Sawmill Gulch at 7,043 feet, Indian Park at 6,997 feet, Pole Bridge Canyon at 6,994 feet, Corral Canyon at 6,924 feet and Boyd Gulch at 6,914 feet. Those are the basins, parks and bottoms this unit has, and they are what you glass into from above. Reaching the edge of one before light beats reaching its middle at noon.
Public ground to start from: Bill Patterson SWA
CPW lists Bill Patterson SWA inside this unit as ground open to public hunting. Each property sets its own restrictions, and the agency's page for it is where they are written down. Federal land covers about 45% of the unit on top of those.
Water: Kaiser Spring, Huntley Spring and Sheep Corral Spring
Named sources include Kaiser Spring, Huntley Spring, Sheep Corral Spring, First Water Spring, Little Water Spring and Third Water Spring. Nothing in the data says which of them run in autumn, so a scouting trip earns its fuel.
The herd this unit belongs to: RBS-38
CPW does not manage bighorn sheep unit by unit. It manages them as data analysis unit RBS-38, and unit S75 is one piece of it. CPW puts no other unit in RBS-38, so this unit carries the herd on its own. So the objective behind your tag was written for that whole area, and a neighbouring unit in the same herd is a fairer comparison than the statewide figure.
Unit S75 terrain and land status
Measured from the unit boundary, not from the agency write-up
Named features inside the unit
Glass from: Brush Mountain (8,892 ft), Sleepy Ridge (8,632 ft), Bear Point (8,604 ft), Cow Ridge (8,598 ft)
Holding ground: The Saddle (7,413 ft), Buck Canyon (7,048 ft), Indian Park (6,997 ft), Bill Patterson SWA
Every one of these was tested against the unit polygon before it went on the map. They are starting points, not agency recommendations.
How to Hunt Bighorn Sheep in Unit S75
Bighorn Sheep Success Rates
CPW's 2023 harvest estimates put bighorn sheep success in unit S75 at 100% — 2 animals taken by 2 hunters. On a sample that small the percentage moves several points with one animal, so read the hunter count beside it.
These are the agency's own printed figures for this unit, not a modelled estimate and not a state average. They describe one season, so check CPW's current harvest estimates before you read a trend into them.
Bighorn Sheep Draw Odds
| Season | Tags | Applicants | Draw % | Pts Req |
|---|---|---|---|---|
| Rifle — 1st Season ram only (resident) | 3 | 355 | 0.8% | 3 |
| Rifle — 1st Season ram only (nonresident) | 0 | 0 | 0.0% | — |
Data from 2026 draw results. Each row is one residency pool — read the label before the number.
Open in Draw Odds EngineCPW's 2026 draw recap for bighorn sheep in unit S75, by hunt code, with resident and nonresident kept apart because the two draw from different licence pools:
- SMS75O1R — Rifle, 1st Season, Ram Only, resident: 355 applicants for 3 licences, 0.8% drawn, 3 preference points needed
Colorado runs a pure preference-point draw, so the point figure above is the requirement the agency published for that code in that year, not a forecast for the next one. Figures checked against CPW's own statistics pages on 2026-06-09.
Unit Logistics & Expectations
Frequently Asked Questions
Where is Colorado unit S75?
What is the bighorn sheep success rate in unit S75?
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Upgrade to Pro — $49/yrSources & Verification
Every fact on this page is tied to a primary source below. Last fact-checked 2026-10-23.
- Colorado Sheep & Goat Hunting Brochure — Game Management Unit (GMU) Descriptions (pp. 16-17) — Colorado Parks and Wildlife · supports: GMU boundary description, Counties the unit lies in, Data analysis unit (DAU) the unit belongs to · accessed 2026-10-22
- 2023 Colorado Rocky Mountain bighorn sheep Harvest Estimates — Colorado Parks and Wildlife · supports: Percent success for bighorn sheep in unit S75, Hunters and harvest by weapon and season · accessed 2026-10-22
- CPW CPWAdminData feature service — GMU and sheep/goat unit boundaries — Colorado Parks and Wildlife GIS Unit · supports: Mapped extent of the unit, Which named ground falls inside the unit line · accessed 2026-10-22