Overview
Guardsman Pass is the hardest road climb in the Salt Lake City area, and it's not particularly close. The route starts at the Big Cottonwood Canyon mouth, climbs the full 14 miles to Brighton, then turns onto the Guardsman Pass road for an additional 3 miles of pavement-to-dirt ascent to the pass at 9,700 feet. The total package is 33 miles with 4,729 feet of gain — more climbing than any of the other canyon climbs in the region, and some of it on a road surface that rewards wider tires or at least a relaxed relationship with road-bike handling.
The pass sits on the ridgeline between Big Cottonwood Canyon and Park City, and on a clear day the summit views justify every vertical foot of effort. To the west: the Salt Lake Valley, the Oquirrh Mountains beyond, and the Great Salt Lake on the horizon. To the east: the Wasatch backcountry and the ski terrain above Deer Valley and PCMR. You're at 9,700 feet, above treeline, on a road that almost no one knows exists unless they've done it. That combination — extreme effort, extreme altitude, legitimate remoteness — is what makes Guardsman Pass a different kind of ride than anything else on the Wasatch Front.
This is a route for strong, experienced riders who are prepared for the altitude, the rough upper section, and the commitment of a 3-hour minimum effort. The Guardsman Pass road is not maintained to the standard of the resort roads below. Come prepared.
The Route
The ride starts at the Big Cottonwood Canyon mouth on SR-190 and follows the canyon to Brighton before turning onto Guardsman Pass Road.
Miles 0–4: Lower Big Cottonwood The opening miles of Big Cottonwood Canyon are the standard warm-up for this region — consistent 4–5% grade, wide road, moderate vehicle traffic. The canyon walls close in quickly and Big Cottonwood Creek runs alongside. This section is well-documented (see the Big Cottonwood Canyon Road Climb route). Save your legs — there's a lot of climbing ahead.
Miles 4–11: Middle and Upper Big Cottonwood The canyon deepens through the middle section, gradient holds at 5–6%, and the traffic thins as you pass Storm Mountain and Silver Fork. By mile 8 you're above 7,000 feet and the air starts feeling different. The final miles to Brighton stay exposed and alpine. This section is where the physical bank account matters — if you've been careless with effort in the lower canyon, the upper Big Cottonwood miles will collect.
Miles 11–14: Brighton The Brighton resort area sits at 8,730 feet. Most riders on the standard Big Cottonwood climb turn around here. On this route, it's the base of the next climb. Stop, eat, drink, check conditions — the Guardsman Pass road above is significantly more exposed than anything you've ridden so far today.
Miles 14–17: Guardsman Pass Road The Guardsman Pass Road turns south from the Brighton area and immediately changes character. The pavement is older and rougher, the grade stiffens past 8% in sections, and the road narrows to barely a single lane with passing pullouts. The tree cover disappears entirely above 9,000 feet and the ridgeline terrain becomes exposed — great views in every direction, strong winds when the weather has anything to say about it. The final quarter-mile to the pass is often unpaved and is absolutely unpaved in any year with above-average snowpack.
Summit: Guardsman Pass The pass sits at 9,700 feet. There's no formal infrastructure — no sign, no shelter, just a cattle gate and the ridgeline. The views are among the best accessible by road in the Wasatch. Take your time. Eat whatever you have left. The descent back to Salt Lake City is going to be long and you'll want every calorie.
The Descent The return on Guardsman Pass Road requires care — the rough pavement and narrow lanes demand lower speeds than the surface would suggest is necessary. Take it slower than you think you need to. Once back at Brighton and onto SR-190, the Big Cottonwood descent is fast and open. Give yourself extra time to warm up before pointing downhill — the altitude means your muscles cool faster than you expect.
What to Bring
- 3 water bottles or a hydration pack — the Guardsman section has no fill options; you're well above any services for the final hour of climbing
- Real food, not just gels — this is a 3-hour effort minimum; pack something with staying power
- Wind/rain layer — the pass is fully exposed at 9,700 feet and afternoon weather builds quickly over the Wasatch ridgeline; a packable shell weighs nothing and matters a lot
- A tire with some volume — road bikes with 25c or narrower tires will struggle on the rough Guardsman Pass road surface; 28c or wider is more appropriate
- Full phone charge — cell coverage is absent above Brighton; someone should know your route and expected return
Local Tips
- Best window: July through September only — Guardsman Pass Road typically doesn't clear of snow until late June, and the first snows can return in early October. Check conditions before committing; the upper road is frequently gated when snowy.
- Morning start is non-negotiable — afternoon thunderstorms are a genuine hazard on exposed ridgeline terrain above 9,000 feet. Be off the pass by 1pm.
- Direction: This description is the out-and-back from the Big Cottonwood side. Some riders shuttle a car to the Park City side of Guardsman Pass and descend into Deer Valley — this requires logistics but eliminates retracing the rough upper section.
- Guardsman Pass Road surface: The road varies year to year based on winter damage and county maintenance budgets. Call ahead or check recent Strava segment data to assess current conditions before riding narrow tires up here.
- Post-ride: The parking area at the Big Cottonwood Canyon mouth is close to Millcreek. Franck's restaurant in the canyon area is a stretch, but the Olympus Hills area at the bottom of the canyon has a handful of decent options. Honestly, you'll have earned whatever you want.