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Obsidian, Pacific Crest and South Sister Loop

hardYellow StarYellow StarYellow StarYellow StarYellow StarYellow StarYellow StarYellow StarGray StarGray Star(13)
Willamette National Forest

Obsidian, Pacific Crest and South Sister Loop is a 32 mile moderately trafficked loop trail located near Sisters, Oregon that features a river and is only recommended for very experienced adventurers. The trail offers a number of activity options and is best used from March until October.

Length 32.0 mi Elevation gain 12,208 ft Route type Loop

Backpacking

Camping

Hiking

Nature trips

Bird watching

Forest

River

Views

Wild flowers

Wildlife

Snow

No dogs

Waypoints (0)
Weather
UV Index
Daylight
Reviews (13)
Photos (32)
Recordings (5)
Completed (40)
Jennifer Fischer
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Hiking

This "trail" follows a boundary line, not the actual trail. This hike is much longer in reality.

Kalon Pilmanis
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Backpacking

One star for a craptastic map of a five star hike. This map is garbage. Do not rely on the author's way points (there are none, btw). The Sisters Loop is approximately 55 miles if you include a summit of South Sister. If you inspect this map closely you will see that it completely abandons the trail on the east side of the loop and appears to walk along the ridge line from peak to peak.

Sarah H
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Backpacking

Hiked the loop clockwise starting from the Green Lakes TH last week. The entire east side is snow-free from South Matthieu Lake until a good way up the climb to Green Lakes pass. The PCT is open again after the fires, but still under a lot of snow. We were only the second set of tracks, so if you hike it this early, bring a good GPS. Beautiful, though!

Matthew Dunham
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Backpacking

A few friends and I backpacked this loop last August. We entered at the Devil’s lake trailhead and proceeded counter clockwise from there. We made it as far as camp lake which is a amazing side trip and worth the extra distance. Unfortunately, we were diverted from there due to a large wildfire north of Camp Lake. Rangers had closed the entire west side of the loop and were rerouting PCT hikers east and then south to avoid problems. We ended up circumnavigating Broken Top and cut the trip short. I will most certainly be going back to finish this loop. Be sure to secure permits for the Obsidian area in advance of your trip, they’re limited.

Tiffany Poe
Yellow StarYellow StarYellow StarYellow StarYellow StarYellow StarYellow StarYellow StarYellow StarYellow StarTue Jan 30 2018
Backpacking

Loved Three-Sisters- although this trail is not 35 mi- it is 45-50 miles depending on your entry point. I hiked clock-wise over 3 days 3 nights beginning at Pole Creek- there is no camping in the burn area at Pole Creek until you reach your first unnamed lake. There was no campfires allowed in Deschutes when I was there- which was not long after the big fire. This may have changed but I would check before going. Green Lakes was amazing, I went swimming in the water and spent plenty of time enjoying myself there, as I suggest to anyone taking this loop! Obsidian Falls was beautiful as well, but again- you can't camp here without special permits. Collier Cone was a long ascent and had limited water- but we never ran out. Overall it was amazing and 10/10 would return.

Lars Helgeson
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Backpacking

my dad and i have done this, i think it was a little longer then 32 miles, i think it was more around 50. Best area ive seen i love it and look forward to going back in july.

Jack Gallagher
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Beautiful trail. I'll do it again

Brian Shaw
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Camping

This was a great loop hike. I would rate it in the moderate category rather then easy. I guess it would depend on how much time you have. Plan your trip carefully as there is no camping in the burn section.

Steven White
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Hiking

Nice loop trip. I went counter-clockwise. There's no camping in the burn area on the East and Northeast parts of the loop, so be prepared for that. There's no water in the 6.1 miles between Matthieu Lakes and White Glacier Creek. Camped the last night at Sister's Mirror lake, which was lovely.

Ari R
Yellow StarYellow StarYellow StarYellow StarYellow StarYellow StarYellow StarYellow StarYellow StarYellow StarSat Sep 13 2014
Hiking

One of the best backpacking areas that I have ever seen. You cannot have fires at Obsidian Springs, but camping nearby is a great idea because the water is the best I've ever tasted and doesn't need to be filtered! Absolutely beautiful every step of the way.

Anthony Ayon
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Hiking
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Cameron Taylor
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Charles Brown
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Hiking
View Charles's Recording