The climb up is rarely the problem. On sunset hikes in Boulder, the trouble comes on the way down, when the light goes flat under the trees and the trailhead gate has a closing time that doesn't care what the sky is doing. Trailhead hours and preserve hours govern the outing, so plan the return first and the view second.
Plan the walk out before you start
None of this guarantees a comfortable descent, but it makes one more likely.
- Set a turnaround time before you leave the car, and hold to it even when the light looks like it's about to do something worth waiting for.
- Carry a headlamp and a second light. Phone batteries sag in cold air, and a phone flashlight aimed at a rocky trail is a poor substitute anyway.
- Save the map to your device before you leave home. Don't count on having a signal at the trailhead.
- Pack a warm layer. Once the sun drops behind the ridge you're standing in shade, not sunlight, and the temperature follows.
- Check the forecast that morning.
Tenderfoot and Chapman Drive from Realization Point
Realization Point sits at 3400 Flagstaff Road. The city lists trailhead hours of 5 a.m. to 9 p.m. daily. Vehicles not registered in Boulder County need a daily or annual OSMP parking permit on Flagstaff Mountain, and the city lists Realization Point among those locations. There are no restroom facilities. Both Tenderfoot and Chapman Drive start from here.
The city lists Tenderfoot at 1.0 mile with 506 feet of gain. That's the trail segment, not a round trip from where you park, so add your own approach and return to it. The trail offers views toward the Indian Peaks and back over Boulder, and it can be combined with Chapman Drive to form a loop. The current city listing notes that Tenderfoot has been realigned and that the Chapman junction moved 0.2 miles east; it doesn't say when that work happened. We've pulled the old turn-by-turn loop mileage from this guide, and those obsolete route notes shouldn't be relied on.
Chapman Drive is a wide gravel path that allows bikes. The city lists the full trail at 2.6 miles, and that's the whole trail end to end, not the length of the loop you'd walk from Realization Point. That bike access applies to Chapman Drive only. The city's OSMP trail regulations table lists Tenderfoot as no bikes and no e-bikes, so the loop isn't a ride.
Hogback Ridge from Four Mile Creek
The Four Mile Creek trailhead at 420 Lee Hill Road reaches the Foothills Trail and Hogback Ridge. The city lists the ridge loop at 1.8 miles with 746 feet of gain, which is the loop itself; the approach from the trailhead adds distance on both ends. Dogs aren't allowed on Hogback Ridge.
Check access before you drive over. We checked the city's OSMP closure page on September 7, 2026. It listed weekday work closures affecting the Foothills Trailhead and the segment between that trailhead and the North Sky junction, with work hours of 7 a.m. to 5 p.m., an expected duration of two to four weeks, and no firm reopening date. That's one segment, not every Foothills route, and the page did not list a closure of the Four Mile Creek approach. Restrictions vary by approach, so consult the current map rather than assuming your usual way in is open.
Green Mountain West Ridge
West Ridge was rerouted in 2019. The city lists 1.9 miles and 800 feet of gain. Doubling that gives roughly 3.8 miles out and back, which is our own estimate rather than a city-published total. The summit has a mountain panorama and a marker identifying the surrounding peaks. Treat the descent as a mountain return rather than an easy stroll back to the lot, and leave enough time to be back at the trailhead before it closes. Our fuller route notes are in the Green Mountain summit guide.
Bummers Rock: a late-afternoon option, not a sunset one
We used to list this one with the sunset walks, and that was wrong. Betasso Preserve is open sunrise to sunset, and you're expected to be out of the preserve by sunset, so this isn't an after-dark outing. Go earlier in the afternoon instead. The Bummers Rock trail is listed at 0.3 miles. Dogs must be leashed, and bikes aren't permitted on Bummers Rock.
Trail work, hours and access rules change, so confirm each of these with the city or county before you go. Pick the route that fits the daylight you've actually got.
Editorial update: September 7, 2026 by Your Boulder. Original author: Alli Fronzaglia.
