Aspen Hills Golf Course

Signature Setup

Aspen Hills sits atop a mountain shelf at Star Valley Ranch in Thayne, Wyoming, with the Salt River Range filling the skyline and the valley dropping away below the tees. I'll be straight: I haven't walked this specific nine, but I've played enough western-Wyoming mountain golf to know what that elevation does to a morning round. Harold Stewart laid the course out in 1979 as a 9-hole, par-36 design measuring 3,130 yards from the back tees. The numbers that matter for scoring are the course rating of 34.8 and a slope of 123 — modest on paper, but the altitude and valley wind make it play tougher than the slope suggests. This is mountain golf: thin air, big sightlines, and weather that swings hard between sunrise and mid-afternoon.

Hole-by-Hole Wind & Playing Lines

On a short par-36 the trouble is wind direction and elevation change, not raw length.

• The #1-handicap par-4: Up at roughly 6,000 feet the ball carries noticeably farther in calm air — I plan for about 8–10% more carry than a sea-level club number. But the moment a valley headwind comes up the slope, that altitude bonus cancels out, and I club back up to my sea-level number instead of trusting the thin-air distance.
• The elevated tee holes: Downhill shots toward the valley play shorter than the yardage; take one less club and let the drop do the work, especially in dry, firm late-summer conditions.
• Any uphill approach into the range: A shot played back toward the Salt River Range often climbs into a freshening afternoon breeze — flight it lower and accept the front of the green.

Green & Fairway Characteristics

This is a high-elevation mountain layout, so the turf leans toward cool-season bentgrass and poa on the greens, which firm up and quicken through a dry August. Fairways run fast when the valley dries out in midsummer, so a well-struck drive can chase well past its carry number. With a slope of 123 and a 34.8 rating, the greens aren't tricked-up, but reading mountain break is the catch: putts tend to drift toward the valley fall line more than they appear to, so I favor the low side on anything I'm unsure of. Across nine holes the routing mixes elevated tees with uphill approaches, so club selection swings more than the flat yardage implies.

Seasonal Weather Pattern

Star Valley's golf season is short — typically late spring through early fall, with the course most reliable from June into September. At this elevation, summer mornings commonly start cool, often in the 40s°F even in July, before daytime highs climb into the 70s to low-80s°F. The defining weather pattern here is the afternoon mountain thunderstorm: the Salt River Range heats through the day and pushes convective cells that can roll in by early-to-mid afternoon. Spring and fall shoulder days can drop near or below freezing overnight, which firms the greens for an early round but leaves frost-delay risk on the first tee.

Local Play Tips

Treat this as an early-morning course. The calm, cool window after sunrise gives you the steadiest air and the lowest storm risk — both the friend of a clean ball flight. Recalibrate your distances for altitude before the round, not on the third tee: at ~6,000 feet your carry runs longer in calm air, but don't bank on it once the valley wind or an afternoon cell moves in. And because it's nine holes, it's an easy walk — leave the cart, keep your tempo, and you can be off the course before the storms build.

Pre-Round Weather Workflow

Check the 7-day G-Score for Thayne / Star Valley Ranch, Wyoming, a few days out, then again the night before. The two numbers to watch here are windExposure and the afternoon storm trend — this is a mountain valley course where the weather changes fast between morning and afternoon. If the forecast shows convective build-up, take the earliest tee window you can get. Pair the G-Score with the wind-direction forecast: a valley headwind erases your altitude carry advantage, so plan to club back up before you reach the first tee, and keep an eye on the radar so you're walking off the ninth as the first cells form over the Salt River Range.