Gregory Canyon, Range View and Flagstaff Trail Loop

MODERATE 225 reviews
#10 of 84 trails in

Gregory Canyon, Range View and Flagstaff Trail Loop is a 3.6 mile lightly trafficked loop trail located near Boulder, Colorado that offers the chance to see wildlife. The trail is rated as moderate and primarily used for hiking, walking, and trail running. Dogs are also able to use this trail.

3.6 miles
1,197 feet

dog friendly


trail running





28 days ago

Great views, nice variety, good workout, a little confusing a couple times as the trail name changed. Would recommend.

1 month ago

This was a good hike, seen some deer on the trail and beautiful views.

2 months ago

Hike up is fun and a bit challenging. I’d rate this hard with a kid pack on your back! Beautiful views and some traffic during the weekday.

2 months ago

Great views, trails are well marked and maintained. Parking is difficult on the weekends, so get there early. Road crossings weren't bad.

5 months ago

Great hike, would have given it five stars if there were not so many road crossings and so close to the road.

5 months ago

Icy in parts, but beautiful overall!

5 months ago

3/2/18- I was really impressed with this trail. I normally shy away from trails so close to the city, because there’s just too many people. But today was surprisingly mellow. Great views of the city, then on the other side you have great views of the mountains (will post pics). A few things:
1) We had to go up Gregory and down Flagstaff (reverse direction from map) because I couldn’t find the flagstaff trailhead. The trailhead is actually on the main road, across from the stop sign. Turn into the little parking area, then walk back down to the entrance stop sign. You’ll see the trailhead there. Gregory’s trailhead is by the roundabout (opposite end).
2) That said! The most icy stretch is on the Gregory Canyon trail. This worked for us because I prefer to go up the ice patches then down on solid ground. So if that is you, go clockwise on the trail!! Very brief stretches of ice, and some parts are fairly steep. But I made it fine with regular hiking boots. Flagstaff was dry, just be prepared for mud.

7 months ago

This was a fun hike, but the last little bit in Gregory Canyon was full of ice and pretty treacherous! Definitely get a pair of ice cleats for that part.

7 months ago

Definitely, one of my favorite moderate medium range hikes. Gorgeous views, challenging sections, and at top there is a park and an amphitheater. You have to cross some roads on your way up. If hiking in winter I really suggest ice cleats as there is A LOT of ice on steep parts. The ice makes it treacherous but fun and interesting ha!

9 months ago

Actually off leash ok- see Boulder's voice and sight control program:

10 months ago

I would rate this easy to moderate. Going up I felt was much easier than Mt. Sanitas. Coming down Gregory Canyon was slightly tougher but not bad. You do cross flagstaff road several times, where you'll see a few cars and lots of cyclists.great views of the higher peaks from the lookout point at the top.

11 months ago

Great trail with some challenging parts. Only downside was the road noise but what do you expect from a road trail?!

Wednesday, July 19, 2017

Kinda boring. Also it was confusing at the top as to how to complete the loop. Once was enough.

Tuesday, July 18, 2017

Very nice and moderate hike

Friday, June 30, 2017

Good trail, beautiful views; not too crowded. Steep in parts with lots of rocks in the trail, but fine with a walking stick. $5 parking fee at all adjacent local parking lots and along the road.

Friday, June 30, 2017

Really nice. I liked that it was a loop. Kind of a grinder heading up, but worth it. A wide variety of terrain and views. I didn't love crossing Flagstaff road so many times on the way down, but I guess that is why it is named. It came out to almost exactly 5 miles for us- we did walk around a bit extra up by Artist's Point and Flagstaff Peak.

Monday, June 26, 2017

Seemed more like moderate to hard IMO. Good views of Chataqua.

Friday, June 16, 2017

Watch out for poison ivy. Views East are pretty good, not all that great to the West (trees block a lot of it). A few rock garden sections but not difficult at all.

Monday, June 05, 2017

Beautiful hike, easy to moderate difficulty, most covered with good options to veer off to increase or decrease intensity. Great for dogs too since there's trashcans, streams for them to cool off, and it's mostly covered and cool. Would definitely go again!

Friday, June 02, 2017

Just did this hike the other day. The Fitbit indicated the trail mapped out is closer to 5.5 miles start to finish. Fantastic views out to the west when you make it to the top.

Sunday, May 28, 2017

Great views. Not difficult technically, but it's a healthy workout on the way up, esp if you're adjusting to altitude. Wear good shoes. Occasional wet/muddy spots after rain earlier in the week.

Thursday, April 27, 2017

Great trail keeps you moving, has some challenges to it but overall a great hike.

Sunday, April 23, 2017

Nice trail for beginning level hikers. It can be lengthened or shortened depending on where you enter at or branch off too. Trail was clear, well maintained, maybe 1-3 spots that were wet or muddy. A few areas where good shoes with decent grip will be appreciated, but over all very nice. 4.23.17

Tuesday, April 11, 2017

There is a $5 parking fee

Friday, February 10, 2017

Amazing Continental Divide Views

Tuesday, December 27, 2016

Loved this trail. Ended up hiking the first flatiron half way through. Challenging toward the top, but worth it!

Saturday, November 12, 2016

The multiple road crossings at the beginning was unfortunate, but we took this to Ute to Gregory Canyon. It was always pretty and was a fun hike. Parking was limited at the first trailhead so go early or plan to park farther along the trail.

Saturday, November 05, 2016

I love the climb in this trail!

Wednesday, September 21, 2016

Great hike. We did Flagstaff to Rangeview to Gregory Canyon. Not too steep or rocky, more of a gradual ascent on flat trials/switchbacks. Amazing views from the Rangeway trail.

Sunday, September 18, 2016

Flagstaff trail up but the trail down (to make it a loop) is Gregory Canyon. It was a bit confusing at the top as to how to connect with Gregory Canyon. The app map helped.

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