Royal Arch Hiking Guide
Royal Arch is the hike everyone in Boulder has done, and the reason is a forty-foot sandstone span that appears out of the forest with the city framed underneath it. Getting there means 1,400 feet of climbing in about 1.7 miles from Chautauqua Park, much of it on stone steps set into the slope behind the First and Second Flatirons. It is short enough to do before work and steep enough that plenty of people do not finish.
Chautauqua Parking
Chautauqua Park is the front door to Boulder's Open Space and it is the busiest trailhead in the county. The lot operates on a seasonal paid parking and permit system, and it fills early on any decent weekend. The city runs a free shuttle in the busy season, which is genuinely the easier option — parking in the surrounding neighbourhood is restricted and enforced. Check the current Chautauqua access arrangements before you drive, because they have changed repeatedly.
The Climb
The route crosses the meadow, climbs into the trees below the Flatirons, drops briefly into a saddle, and then attacks the final pitch on rock steps. That short descent in the middle catches people out — you lose elevation you then have to regain, and you pay for it again on the way home. The last quarter mile is the steepest and involves hands in a couple of places. Two to three hours is normal.
Altitude, Even Here
Boulder sits at 5,400 feet and the arch is above 6,900. Visitors flying in from sea level routinely underestimate what that does to a steep 1,400-foot climb, and the first-day headache is a Boulder rite of passage. Drink more than feels necessary, give yourself a day before attempting anything harder, and do not read a slow time on this trail as a fitness problem.
Weather Comes Fast
Afternoon thunderstorms build over the Front Range with very little warning from roughly June through August, and the upper part of this trail is exposed rock. Locals start early as a matter of course. In winter the stone steps hold packed snow and ice for weeks — microspikes turn a treacherous descent into a pleasant one and are worth carrying from November through April.
Dogs and Open Space Rules
Boulder Open Space allows dogs, and on many trails permits voice-and-sight control under a registered tag scheme rather than a leash. Royal Arch is popular with dogs, but the stone steps are hard on paws and the crowds make a leash the courteous choice regardless of what the rules permit. Stay on the tread — the slopes below the Flatirons erode quickly and Boulder's open space staff are visibly protective of them.
Hiking tips for Royal Arch
- Take the free seasonal shuttle to Chautauqua rather than fighting for the lot; neighbourhood parking is restricted and enforced.
- Expect to lose elevation in the middle saddle and regain it — this catches out people pacing off the total gain figure.
- Give yourself a day at altitude before attempting this if you have flown in; 6,900 feet on a steep climb is a real factor.
- Carry microspikes from November through April, when the stone steps hold packed ice long after the meadow has cleared.
- Start early in summer; the upper rock section is a poor place to be when Front Range thunderstorms build.
Nearby trails to explore
- Mount Sanitas
- Chautauqua Trail
- Bear Peak
Hike this trail with TrailMates
Royal Arch is Boulder's signature climb and the trail where local hiking groups tend to meet. Use TrailMates to find Front Range hikers heading up from Chautauqua before the lot fills. Download the TrailMates app to join them.