Upslope Brewing Company – Flatiron Park
1898 S Flatiron Ct, Boulder, CO 80301
Well-behaved, supervised dogs on a leash are welcome on the Flatiron Park patios; dogs are no longer allowed inside because of health department rules.
- patio
Rattlesnake Gulch Loop – Eldorado Canyon State Park
Dog-friendly hike near Boulder · Eldorado Canyon State Park (Fowler/Rattlesnake Gulch trailhead inside the canyon), 9 Kneale Rd, Eldorado Springs
Illustration of the region, not this trail.
Dogs on this trail
Leashed dogs are permitted; Rattlesnake Gulch, Fowler, Streamside and Eldorado Canyon trails are listed as dog friendly, with the state-park six-foot leash rule.
Source: Colorado Parks & Wildlife · checked 2026-10-24. Rules change; confirm before you go.
- Distance3.6 mi
- Elevation gain1142 ft
- Leash ruleLeash required
- Water on trailSouth Boulder Creek at the canyon floor; none on the climb
- SeasonYear-round; timed-entry reservations on weekends and holidays May 1–Oct 1
- ParkingInner-canyon parking is limited; a timed reservation guarantees entry but not a spot at your trailhead; no parking in the town of Eldorado Springs; Oct–May the park hits capacity 10 a.m.–2 p.m. on weekends
- Fee$10–$12 daily vehicle pass (Colorado plates) or $4 walk-in; free timed-entry reservation required weekends/holidays May 1–Oct 1
- RestroomsVault toilets in the inner canyon
- Managed byColorado Parks & Wildlife
Rattlesnake Gulch switchbacks up the south wall of Eldorado Canyon to the ruins of the old Crags Hotel and a Continental Divide overlook, 3.6 miles round trip with about 1,100 feet of climbing. Dogs get a creek dip at the bottom and shaded pine on the way up. This is a leash park, strictly enforced, and the trail is popular with climbers' dogs waiting out long routes. The hard part is getting in: weekend and holiday timed-entry from May through September, and a full-capacity gate much of the off-season. Go on a weekday or walk in from the Eldorado Springs lot (no reservation needed on foot). Summer heat on the south wall is real.
Need a sitter while you summit?
Independent Boulder boarders and daycares can send free quotes. One short form, no obligation.
Dog boarding in Boulder Daycare in BoulderAfter the hike
Avery Brewing Company
4910 Nautilus Ct, Boulder, CO 80301
Avery describes its outdoor beer garden and patio as dog-friendly; dogs stay outside while you drink and dine.
- patio
More trails near Boulder
- Chautauqua Trail and Royal ArchBoulderVoice & Sight tag or leash · 0.7 mi
- Mount Sanitas & Sanitas Valley LoopBoulderVoice & Sight tag or leash (no dogs on Lion's Lair) · 3.5 mi
- Marshall Mesa LoopBoulderVoice & Sight tag or leash · 2.7 mi
- Doudy Draw to Flatirons VistaBoulderVoice & Sight tag or leash; seasonal leash Aug. 15–Dec. 1 · 2.2 mi