Constrychnine Canyon, Poison Spring

Last Candition: April 19, 2012


3 out of 5
Date of Trip: December 1, 2019

The canyon flooded last night and is full of water. We were able to stem over all of it except for one calf deep pool,but is wasn't easy and a slip could leave you swimming.

5 out of 5
Date of Trip: May 12, 2019


Anchors in good shape. Although the "piton rap" outer webbing is showing wear. Inner webbing looked good. Inspect carefully.

First rap continues to have the webbing setup short. Be sure to extend over the lip for the last person down, to avoid grooves.

Second rap use caution in deploying your pull side.

5 out of 5
Date of Trip: May 20, 2018

Great canyon! Anchors all looked good. Entire canyon was dry.

5 out of 5
Date of Trip: November 18, 2017

Awesome canyon! I hadn't been overly impressed by the other canyons we'd done during our trip so maybe I had low expectations, but I really enjoyed this one. Big fun rappels, deep beautiful slots, a few great downclimbs and an exciting climb out. Very scenic. Great fun. All anchors had been replaced within a day or two and were in great shape. Group of 5 completed it in 3.5 hours. A few pools toward the end of the canyon, all avoidable. I'll do this one again.

5 out of 5
Date of Trip: September 3, 2017

great canyon!! very dry, however recent flash flooding left most anchors a mess so we replaced all anchors in the canyon except the first rappel. group of 6 ( 3 first time canyoneers) took 8 hrs car to car

3 out of 5
Date of Trip: May 26, 2017

Mostly dry with two ankle deep avoidable pools.

5 out of 5
Date of Trip: November 12, 2016

Dry except for one avoidable pool. People seem to be leaving set hand-lines in a lot of canyons these days instead of learning how to down climb with partner assist, the Poison Spring trio no exception. All rap anchors in good condition / easy rope pulls. Using an exit directly across from the bottom of Constrychnine (which we affectionately call the Barnyard Bypass) allows ample time to combine Arscenic, Constrychnine and Slideanide into a one day adventure. Roads just graded. Lots of people doing these canyons...

5 out of 5
Date of Trip: March 11, 2016

Lots of talk about anchors in this canyon on the chat forums over the past few years. While not simple, the anchors were more straightforward than it seemed from the discussions. Rap 2 is from both a deadman and a pretty solid tree 35 feet back. Rap 3 had two possible anchor points: the overhead one on a chokestone and one up the canyon 30 feet on a chokestone. We used the latter, but I am not tall and could easily reach the rap ring on the former. The rest of the drops were downclimbs for us, set up with handlines on chokestones or (the last) on a deadman. All anchors pre-existed our trip and were in great shape. Good skills helpful in evaluating them or setting them up when they get worn. Thanks to all the great anchor builders out there in the community! Fun canyon!

4 out of 5
Date of Trip: February 15, 2016

There was snow but nothing sketchy. Had to walk through a few spots where the snow was above the ankle. All the anchors were in place and in great shape.

5 out of 5
Date of Trip: October 24, 2015

Big storm a few days prior filled all canyons in the area. Unavoidable water, waist deep for all, one team member found a place to get chest deep. Big rappels were spectacular, very scenic canyon. With all the warnings about the deadman at the big rappel, it is a mystery why no one ever mentioned the bomber tree about 35 feet from the drop. Sort of a no-brainer there. Fun day.

4 out of 5
Date of Trip: March 26, 2015

Canyon was bone dry. We rebuilt most the anchors which ate up tons of time. We removed/packed out a massive amount of webbing from this canyon. Combined with Slideanide, the trash webbing completely filled a medium sized backpack. Truck to the top of Slideanide took 4 hrs 20min.

4 out of 5
Date of Trip: March 14, 2015

Same as always; anchors in good shape, small, avoidable pools. The first rappel's webbing could potentially need to be replaced soon.

5 out of 5
Date of Trip: November 15, 2014

Fantastic! Completely dry except for a pool at the bottom of the rounded downclimb / short rappel at the end.

5 out of 5
Date of Trip: May 25, 2014

The road is fine for any vehicle but getting washboarded. Canyon is full of water after recent storms. Got wet up to chest deep. Webbing and anchors in good conditions. Used the "new" exit up the ridge between Slidenide and Arscenic. Much shorter and preferable to slogging down and around. Truck to truck in four hours.

5 out of 5
Date of Trip: May 4, 2014

3 minor sections of water, can be avoided with extra effort, the first being the most difficult to avoid. Nothing deep. One of those is a shallow pool just before the 90 foot rap. At the big 2nd rappel found 3/4" webbing slung around a boulder and then a backup stretched to some smaller trees up canyon. Replaced the beginning to fray 3/4". At the 90' drop, the chockstones above the drop were slung. This was backed up with a sling running up canyon to some other chocks. These checked out okay. There is also another drop after the last 90' rappel that's about 25 feet on a sloping face that had a secure deadman anchor. Dry below there. Impressive rappels in this canyon and some excellent photo ops.

5 out of 5
Date of Trip: November 2, 2013

Epic! Webbing in good condition. Couple of muddy spots and one pot hole that had water and a moderate downclimb side step and all is dry. 6 of us from trail head to trail head 5 hours.

5 out of 5
Date of Trip: October 19, 2013

No water. Some muddy spots. All avoidable. Good webbing on first two raps. Last rap has brand new webbing on a choke stone very exposed over the cliff. At 6' 3" I was not going to reach for it while dangling over the cliff and did not want anyone climbing to it. We put new webbing on a choke stone up canyon.

4 out of 5
Date of Trip: October 6, 2013

There are some pools of water in the bottom half of the canyon. Nothing more than thigh deep. With significant effort, it can all be stemmed over.

We rebuilt a couple of anchors in the canyon, so they are all in good shape now.

WARNING: Two of the rocks at the top of the biggest rap are loose. They probably weigh 200-300 lbs and can be moved easily. Choose your anchor wisely.

4 out of 5
Date of Trip: September 20, 2013

Pulled off a hat trick in poison spring: constrictnine, arscenic, slidenide....and finished the day in zero g. Small wades and a bit of in poison spring canyons. Nasty pull in the first rap series in arscenic. We rapped the first 60ft and reset the rappel for an easier pull. Webbing acceptable in all canyons. 7.25hrs for all 3 poisons springs canyons. We discovered numerous escapes on to the bench that saved lots of time

5 out of 5
Date of Trip: February 19, 2013

Road was dry & easy to drive.

No snow to be found, except in small shaded patches down in the canyon. Otherwise completely dry.

The webbing anchor on Rap 1 was 10-15 feet short of the canyon lip and would have added to the many deep rope grooves there. Would also have made the rope pull rather difficult. We extended the webbing to the lip and just rappelled to the ledge 20 feet down. From there, we strung a new webbing anchor around a large boulder. This new set-up should be used by all to avoid any further rope grooves tearing this place up.