Royal Arch, Chautauqua Park Trailhead, Boulder - Denver - Golden - Fort Collins - Lyons, Colorado
Royal Arch - 3.2 miles
Chautauqua Park Trailhead
|Round-Trip Length:||3.2 miles|
|Start-End Elevation:||5,710' - 6,915' (6,915' max elevation)|
|Elevation Change:||+1,205' net elevation gain (+1,417' total roundtrip elevation gain)|
Royal Arch - 3.2 Miles Round-Trip
Royal Arch (6,915') is perched high along a rugged fold in the Boulder Flatirons. These rocks are remnants of the Fountain Formation, a mineral-rich sand eroded from the ancestral Rocky Mountain uplift 300 M years ago. Trail Map | Photo Gallery
Sediments deposited by the ebb and flow of inland oceans compressed this layer into sandstone, thrust upward 45 M years ago by the same tectonic forces that created our modern Rocky Mountains.
Royal Arch is a fragment of the exposed Fountain Formation sculpted by water, wind and mechanical erosion into the 20' span we see today.
The following describes the most direct route to Royal Arch, which begins at the Chautauqua Park Ranger Station and climbs Bluebell Road to access the Royal Arch Trail:
Bluebell Road rises steadily over Chautauqua Park past the Mesa Trail junction (.6 miles : 6,005') and Bluebell Shelter to the Royal Arch Trail (.7 miles : 6,095').
The Royal Arch Trail narrows through mixed pine to a connection for Flatiron #2 and #3, and bends south up a steep, narrow gulch (.9 miles : 6,188'). Note apple, plum and maple in this diverse riparian corridor.
The trail steepens away from the upper-gulch up to Sentinel Pass (1.35 miles : 6,768'), a rocky notch at the top of Bluebell Canyon. Enjoy close-up cross-sections of the Flatiron rocks from this point.
It drops from Sentinel pass about 100' and resumes a strenuous, twisting climb over the steady trickle of Tangen Spring to the base of Royal Arch (1.6 miles : 6,915'). Walk under Royal Arch to a set of outcrops with sweeping views across the foothills, eastern plains and downtown Denver.
- N39 59.930 W105 16.970 — 0.0 miles : Chautauqua Park Trailhead
- N39 59.496 W105 17.119 — .6 miles : Mesa Trail split - keep right on Bluebell Rd
- N39 59.465 W105 17.247 — .7 miles : Begin Royal Arch Trail
- N39 59.357 W105 17.319 — .9 miles : Flatirons #2 and #3 spur
- N39 59.139 W105 17.507 — 1.2 miles : Break away from gulch, climb steepens
- N39 59.068 W105 17.489 — 1.35 miles : Sentinel Pass
- N39 58.923 W105 17.504 — 1.6 miles : Royal Arch
- The Bluebell Shelter was constructed in 1921 by the local Lions Club. The stone wall, hike-in only structure is available for group picnics and activities, and accommodates up to 50 people.
- The Royal Arch Trail is a great place to observe climbers on the Flatirons.
Rules and Regulations
- Dogs must be on a hand-held leash unless they meet Voice and Sight Control Standards and display a City of Boulder Voice and Sight Tag.
- Camping is not allowed in Chautauqua Park. Day use only.
Directions to Trailhead
From Boulder Take Baseline Road west past 9th street and Chautauqua Park is on the left hand side. Turn left into Chautauqua Park. Overflow parking is also available along Baseline Road, south of the park entrance.
From Denver: Take I-25 North to Highway 36 towards Boulder. From Highway 36, take the Baseline Road exit and turn left. Take Baseline Road west past 9th street and Chautauqua Park is on the left hand side. Turn left into Chautauqua Park. Overflow parking is also available along Baseline Road, south of the park entrance.
City of Boulder Open Space and Mountain Parks