Twin Falls

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Twin Falls Canyoneering Canyoning Caving
Also known as: Lower South Fork Snoqualmie River.
Rating:
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Twin Falls Banner.jpg

Difficulty:4C3 II (v4a5 II)
Raps:‌4 + 1 jump, max ↨140ft
Metric
Overall:2.5-5h ⟷2.8mi
Approach:30min-1h ⟷1.5mi ↑800ft
Descent:1.5-3h ⟷0.3mi ↑400ft
Exit:30-45min ⟷1mi ↑400ft
Red Tape:No permit required
Shuttle:None
Vehicle:Passenger
Rock type:granite, basalt
Start:
Parking:
Condition Reports:
23 Sep 2024




"Awesome day in Twin Falls! Time includes running the whole route twice! We skipped the redirect on R2 for the second lap (and we short rope + jumped R

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Weather:
Best season:
Aug-Sept
winterspringsummerfall
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Regions:


Welcome! Canyons in the Pacific Northwest can be different from those you might be used to. Be ready for unlinked bolts, retrievable traverse lines, and challenging aquatic environments. For more on local practices, and the best way to get started in the region, check out the WCC Safety page.
  • Unlinked Bolts - groups should be comfortable rigging unlinked bolts, either temporarily linking them for all but the last person, or using a passive redundancy method. Most importantly, if you find two bolts side by side that are unlinked, do not add webbing to them. Linking bolts designed to be unlinked will likely cause damage during seasonal floods.
  • Traverse Lines - many canyons are rigged to allow traverse line access to an exposed anchor station. This should be done using self-belay or team belay techniques. Do not leave fixed lines in the canyons.
  • Challenging Environments - the highly aquatic nature of PNW canyons can surprise many. Cold temperatures, slippery rocks, loud waterfalls, and strong currents all lead to unexpected problems. Do not underestimate the need for strong team work and technical proficiency. Belays are frequently not possible. Unattended gear will sink or float away. Sliding and jumping is the cause of most major injuries, so it's critical to effectively communicating water depth & submerged hazards.

Introduction[edit]

Despite the name, 5 distinct waterfalls reside in this beautiful, deep, carved canyon. Although short, this canyon makes up for it with memorable rappels, a multitude of jumps ranging from 5 to 55 feet, clear water, deep pools, good afternoon sunshine and if you can reach it, a 40 foot slide.

Please be very aware of the high profile nature of the area.

The canyon is within a Washington State Park, a highly managed area of land. On a sunny summer weekend, hundreds of tourists will visit the falls. For large sections anyone canyoning will be highly visible. Our access to descend Twin Falls as canyoneers is highly dependent on not being deemed a detriment to the park.

In order to keep the impact of our visibility down, please follow these best practices:

  • Avoid running the canyon at peak times. e.g. weekends, holidays, etc. Due to it's short length this canyon works well as a summer evening post-work trip too.
  • Keep your team small and efficient. Fast and efficient movement through these sequences is important.
  • Anchors need to be placed with consideration to their visibility from the trail. Anything placed insight of the trail should be kept to neutral/natural colors (e.g. black, grey, brown webbing).

This is not a beginner friendly canyon.

Despite its short length & and easy access, this route contains a wide range of hazards. Even at the end of an exceedingly dry summer this canyon produces pools with strong currents, pour-over lips, and hydraulics with undercut walls. Further hazards exist in the form of tricky rope-pulls, and a risk of pendulum swings into heavy flow. Your team should contain confident swimmers who can read water conditions, and also have strong rope management experience.

Approach[edit]

Park at Twin Falls Parking Lot, situated just off junction 34 of I90. Hike the well maintained trail for 1.2 miles until just BEFORE you cross the wooden footbridge across the canyon. DO NOT CROSS THE BRIDGE... (unless you want to take some photos of the canyon below. Instead, deviate from the trail and hike up an obvious user trail up through steep trees and ferns. When you reach the top of the ridge, the trail continues right, along flat ground. Follow this until you come to the top of a large cliff. You will be able to hear and see the river below. Look for a webbing anchor around a tree. If you see it, you have arrived at the start of this epic canyon. There is plenty of room here to suit up and perhaps inhale a Clif bar or 2.

Water level reference pictures are of R2. This is visible from the hike-in shortly after leaving the official trail.

Descent[edit]

R1: 130' off a webbing anchor around a tree - not the webbing on the first tree you see (this will drop you at the bottom of R2); it's the tree to the left at the very edge of the cliff.

  • Option 1: Recommended for the easiest pull, rope management, and group efficiency. Rappel 105' down to a ledge with room for two. Jump 20' from the ledge. There is also a ledge 5' lower.
  • Option 2: The no jumping option. Rappel all the way to the water for a deep water disconnect. Swim to the opposite side and pull the rope from the rock outcropping. The rope falls into the pool with a current so there is a risk of rope entanglement underwater.
  • Option 3: If you like big jumps (and you cannot lie), rappel down 75' and disconnect on the big shelf, jump 55' into the deep pool below.

In all cases, from the pool swim DCR to a nice ledge to climb out onto. (Don't jump if flow is strong at all as there is an undercurrent + you could get pulled over the next falls).

R2: 70' off of bolts DCR: This is the crux of the canyon. Rappel 60' to a ledge that is 5' above the pool, staying DCR out of the flow. Use the redirect 10' below the anchor on the underside of the overhanging face. A long quickdraw has been left here. Even on the lowest flow days, it is unrealistic to rappel in the flow as it is very concentrated on the first tier. Pull the rope from the ledge that is 5' above the pool. Two people can stand on the ledge. Jump 5' into the pool and swim hard DCL to cross the central current, and exit at the boulder field (extremely slippery rock!).

Optional Jump: swim across the pool on the right side to the rock outcropping. Jump 10' from it and continue your momentum to swim across the current.

Note: In either case, swim further left than you think to counterbalance the push of the current. The hanging pool at the 3rd drop can have wood and contain a massive boil that is unlikely to survive in all but the lowest flow conditions.

  • Redirect bolt on R2
  • Early Exit: there's a use trail at the back of the boulder field which leads steeply up to the official trail above.

    R3: 50' from bolts DCL: In higher flow, a dry option bypasses the middle pothole pool. Use the double bolt webbing anchor, high on the canyon wall DCL. This leads down to a ledge above the large pool, from which the rope can be pulled. Jump 10' into the pool.

    In lower flow, you may want to opt for the single bolt anchor on the underside of the big boulder. This line allows you to rap into the pothole and then down the next drop. This drop can also be jumped or slid as the pool is some 20ft deep below. Beware that the current in the first pothole is pushy and once you are in the big pool after the 2nd falls you have to swim hard DCL to avoid being pushed into a huge alcove DCR.

    J1: Jump 15' from the central rock into the pool directly under the footbridge. There is a massive tree trunk lodged in the pool that is easy to avoid. It's a good ledge to launch from, which makes clearing the underwater shelf near the waterfall straightforward. This drop could be rappelled either with a meat anchor or a natural anchor.

    At lower flows it's relatively easy to swim this pool staying DCL to an eddy pool and climb out. However, due to the exposed nature of this swim, a single bolt anchor was placed on the back alcove wall (next to the little waterfall that comes into the pool from DCR). This allows you to swim on rappel to the safety of the climb out ledge DCL. Please note that swimming while attached to a rope is dangerous. As the rope goes tight the current can start flowing over the top of you, and force you under water.

    There's is a small rock outcrop halfway DCL, which makes regrouping and strategizing the approach to the edge easier.

  • The approach to the main falls, showing the small rock outcrop.
  • R4: 140' DCL off of a 2 bolt anchor. Please DO NOT add any webbing to this anchor as it is in direct line of sight of the viewing platform for hikers and phographers. Great care was taken when placing the bolts so as to make them virtually invisible from the trail. Bring 400' of rope in order to pull from the far side of the pool up on the bench that makes it considerably easier

    • Option 1: The driest easiest option. From the anchor stay DCL, get into a nice fluted chute that has minimal flow, which lends itself to a nice long slide on rappel.
    • Option 2: If flow is low enough, from the anchor immediately go DCR as much as you can and maintain a DCR headline by leaning hard left, with feet up and heels on the wall, rap as far as you possible can DCR. Your goal is to get on the right side of a rib about 1/3 of the way down. Once DCR of this rib, it's easier to stay DCR. Free slide from a slight ledge 40' up or lower at 25' up. The slide is high-angle but not vertical. There is a perfectly angled exit ramp into the deep pool below.

    If you haven't had enough jumping yet, after pulling your rope, from the ledge DCR jump 12' into the deep pool.

    Note: The bulk of the flow is extreme right in a massive crack cut out of the rock layers far DCR. It would be a death wish to go in there, but nearly impossible to go that far right as the fall line brings you DCL. It is a marvel of the force of water.

    Exit[edit]

    Red tape[edit]

    Discover Pass is required for the parking lot. There's a machine selling day passes.

    Beta sites[edit]

    Trip reports and media[edit]

    Background[edit]

    Credits

    Information provided by automated processes. KML map by (unknown). Main photo by (unknown). Authors are listed in chronological order.

    In all habitats live animals and plants that deserve respect, please minimize impact on the environment and observe the local ethics. Canyoneering, Canyoning, Caving and other activities described in this site are inherently dangerous. Reliance on the information contained on this site is solely at your own risk. There is no warranty as to accuracy, timeliness or completeness of the information provided on this site. The site administrators and all the contributing authors expressly disclaim any and all liability for any loss or injury caused, in whole or in part, by its actions, omissions, or negligence in procuring, compiling or providing information through this site, including without limitation, liability with respect to any use of the information contained herein. If you notice any omission or mistakes, please contribute your knowledge (more information).

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