O’Brien Trail is a 12.4 kilometer lightly trafficked loop trail located near Missoula, Montana that features a great forest setting and is good for all skill levels. The trail is primarily used for hiking and mountain biking and is accessible year-round.

Length12.4 kmElevation gain449 mRoute typeLoop
HikingMountain bikingForest
Description
Waypoints (0)

Note: This trail is closed Nov 15-May 15 to help preserve the local elk habitat.

Weather
UV Index
Daylight
Reviews (39)
Photos (34)
Recordings (28)
Completed (54)
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Michael Jensen
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Hiking

Off trail much of the way. Spectacular views & highly recommend summit of Black Mountain!

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Jancy Wells
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Mountain biking
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Tane Mooney
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Hiking
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Tane Mooney
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Hiking
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Nico Peruzzi
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Hiking

Nice trail with lots of wildflowers. Some exposed sections, but also plenty of places to find shade. First half mile is pretty steep. We went clockwise, which puts the steeper grade at the beginning of the loop and the more mellow grade at the end. Stream across from parking area to soak your feet after the hike.

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Mark Shenker
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Hiking

We were here 16 days ago. Much has changed: new flowers; trails narrower because of shrub growth; and quieter than ever. We pleasant trail for a quiet couple of hours. At about mile 4.7 (hiking counter-clockwise) the trail goes down to the creek. It is another world where the damp and shade encourages a whole different set of flora.

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Mark Shenker
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Hiking

The first half mile from the THD to the loop is alone worth the trip for the wildflowers. The trail is easy, quiet, and if it offered more views would rate 5 stars.

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leslie whitmore
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Hiking

Trail is in great shape: dry, no snow. The creek is running full. Really nice, mostly open loop with great views.

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Cee Carson
Yellow StarYellow StarYellow StarYellow StarGray StarGray StarGray StarGray StarGray StarGray StarMay 1, 2020
HikingClosed

This loop is CLOSED Nov 15-May 15 for elk habitat. This is poorly marked at the trailhead and requires reading the fine print, but only specific parts of the trail are open during the off-season. Please be respectful of this area during that time.

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Carey Powers
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HikingNo shadeSnow
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Kim Kresan
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I love this trail; can't believe I didn't know about it sooner. Took me something like 2-3 hours at a pretty steady clip, but I wouldn't call it strenuous at all - little uphill sections followed by long flat chunks. Nice views and nice variation in terrain. I never see anyone else once I get past the first section either. Definitely recommend!

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Brandon Marx
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HikingOver grownRocky

one of my favorite hikes all year. If you do the full loop I wouldn't call it easy, more intermediate. bring water. beautiful!!

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Rena Schweizer
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Running
First to Review

Beautiful views of Missoula, gently sloping hills. Great for a trail run!

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Lenore Lezanne
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Road biking
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Paul 3
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Hiking
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Neil French
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Hiking
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Susan Seay
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Hiking
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sara hart
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Mark Shenker
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Hiking
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Yogi Bears Smith
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Hiking
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Mark Shenker
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Hiking
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Anna Baldwin
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Hiking
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Randilynn Stott
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Hiking
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Chelci Bruno
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Hiking
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Norman Jarvis
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Hiking
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Quint Bishop
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Hiking
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Bob Sewell
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Hiking
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Mark Shenker
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Hiking
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Showing results 1 - 28 of 39