We are approaching the prime season for El Potrero Chico in northern Mexico. This month’s incident took place earlier this year on one of the most sought-after routes in this sport climbing paradise. The classic Time Wave Zero is perhaps the second-longest sport route in North America.

Belay Failure From Above

El Potrero Chico, Nuevo León, Mexico

“On March 14, 2023, my friend (the belayer) and I (Liu Yuezhang, 26) headed to Time Wave Zero (2,000’, III 5.12a or 5.11 A0) in El Potrero Chico (EPC) to check out the approach and prepare for a full attempt a few days later. Our plan was to try the moves of the first two pitches before returning to the ground. While following the second pitch (95’, 5.11b, nine bolts), I experienced a belay failure from above, hitting my right lower back, head, and both elbows as I fell. I was rescued by the EPC rescue team and local climbers. Miraculously, I was not seriously injured.

We had reached the crag around noon. It was drizzling, so there were not many climbers heading out. We were glad to meet two female climbers at an area close to Time Wave. They eventually performed the rescue. I led the first pitch (100’, 5.7, four bolts) and belayed my friend up. We switched leads and my friend led the second pitch, set up the belay, and notified me to follow.

My partner was belaying in guide mode off the bolted anchor (see Fig. 1). He double-checked the system by pulling on the climber’s side of the rope. I climbed to the eighth bolt. Earlier, I had noted that the crux was between the eighth and ninth bolt, so I decided to check out the moves. I said, "Take." I was on the rope around five to ten seconds when I suddenly began to free-fall. I remember the sky moving further and further away, so I must have been falling face up, with my back downward. I thought I was going die.

The belayer remembers releasing both hands at one point, after which the climber’s side of rope began to run rapidly through the ATC. In a panic, he attempted to hold the climber’s side, rather than the belayer’s side of the rope. His right hand got seriously burned. Eventually, the rope (9.5mm, 70m, almost new) stuck inside the belay device (Black Diamond ATC Guide, with Black Diamond RockLock screwgate carabiner) and I was stopped in a slabby area, around ten feet below the pitch 1 anchor. The falling distance was around 60–85 feet.

From my injuries, I inferred that I hit my lower right back on a bulge first, then struck the back side of my head and both elbows before sliding down the slab. My neck and tongue were also slightly impaired by the impact. Due to amnesia, I could not recall some details of the fall. I was wearing a helmet, backpack, and long-sleeve jacket. I noticed climbers approaching on the ground to provide help. Then, in what seemed to be the next second, they were above, readying to lower me. According to the belayer, I repeatedly asked “Where am I?” and said “Record the accident scene.”

The belayer spent around ten minutes trying to feed slack efficiently after I was connected to the rescuer, but I also did not recall this. My consciousness came back to normal while being lowered, but I still experienced some long-term memory loss. The rescue team performed a rapid response, and I was carried on a stretcher to an ambulance. This took around 30 minutes. I was sent to the emergency room in Monterrey and luckily was not seriously injured. I would like to express my utmost gratitude to the EPC rescue team and local climbers for the speedy rescue, especially Juliet. She was one of the female climbers we met earlier, who re-led the first pitch and lowered me down.”

—Liu Yuezhang

ANALYSIS

Yuezhang wrote:

“There were a few mistakes made. One error was when the belayer released both hands while belaying from above. This should be strictly prohibited even with an [assisted-braking] system. Also, the fall could have been caught if he had pulled the correct (belayer’s) side of the rope.

“Besides the above two obvious errors, we next tried to analyze the cause of the autoblock system failure. The ATC setting from the accident is shown in Fig. 1” (below).

Yuezhang added:

“From the photo, we can confirm that the ATC was set correctly (left strand is the belayer side and right strand is the climber side). The climber’s side was initially on top, and eventually got stuck beside the belayer’s side due to the falling impact. After some experiments, we found that the autoblock system might fail if (i) there was a horizontal component force pulling outward, since the belay station was above a bulge, and (ii) the wire of the ATC was stuck by something on the cliff. A repeat experiment is shown in Fig 2 (below). Again, this scenario is very unusual and can be avoided by always having a hand on the belayer’s side.”

Yuezhang concludes:

“I was the more experienced climber in the team (one year of trad, multiple years of ice and sport climbing) and received training in multi-pitch climbing from an IFMGA guide. The belayer was the stronger, but less experienced, sport/gym climber. He had no experience of multi-pitch climbing before the trip. To compensate the experience difference, we held two educational sessions in a gym and completed two multi-pitch routes together. At EPC, we climbed several multi-pitch routes while safely switching leads. I emphasized the importance of keeping a hand on the belay side of the rope, even while in autoblock mode. Due to the limited experience with the ATC Guide, the belayer failed to react properly. Also, always wear a helmet. Mine saved me from more severe injuries.”(Source: Liu Yuezhang)

Editor’s Note:

It is possible that when Yuezhang called “take,” the belayer may have grabbed the bight carabiner (or the ATC retaining wire) to disengage the rope/carabiner/device in order to more easily take up slack through the device. While this is not recommended by the manufacturer, it is not an uncommon technique. Yuezhang recalls, “If my memory serves me, the belayer told me he first pulled the slack when I called ‘take.’” Thus, it is plausible that the belayer, finding it difficult to pull in slack, disengaged the rope. When the bight carabiner or retaining wire is pulled upward, it also orients the rope perpendicular to the top of the ATC (as shown in Fig. 2 above). In this case, the ATC might have been pulled horizontally. If the belayer did just that, while Yuezhang momentarily shifted his weight on and off the rope, the rope could have begun to slip rapidly through the ATC (see Fig. 3 below).

We know that the belayer, now panicking, mistakenly grabbed the follower’s side of the rope in a vain attempt to arrest the fall. His grip may have prevented the device from loading, that is, until excruciating rope burns forced him to release the rope. At this point, the rope locked in the now loaded ATC. The newness of the rope also probably played a role in the accident. Note that in the video below and in Fig. 1, the climber side of the rope is loaded adjacent to the brake side, not on top, as per the intended design. This is probably due to force of the fall and the slickness/diameter of the fresh rope. Extra caution must be taken with any braking or belay device when using a thin and slick rope.

Fig. 3 If the bight carabiner or retaining wire of the device is caught or held upward, and the climber’s side rope is loaded while perpendicular to the top of the ATC, the device can fail to catch. Video: Liu Yuezhang

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We are entering the prime season for climbing on the East Coast, so this month we’re featuring an incident that took place on Moss Cliff in upstate New York. Don Mellor, climbing guide and author of American Rock and Climbing in the Adirondacks, calls Moss Cliff “among the most appealing rock walls in the Northeast." Such an attractive crag has its inevitable share of mishaps. The following report appears in the 2023 edition of Accidents in North American Climbing, which is being mailed to AAC members this month, and has been expanded here with more information from the ranger involved in the rescue.

STRANDED | Stuck Rappel Ropes

Adirondacks, Moss Cliff

At 6:30 p.m. on October 16, 2022, the New York State Department of Environmental Conservation (DEC) rangers received a call from two climbers who were stranded on Moss Cliff in Wilmington Notch within Adirondack State Park. Moss Cliff is a 400-plus-foot face with a 30-minute approach that involves fording a small river.

The two climbers had topped out on a four-pitch trad climb called Hard Times (5.9+) and had completed their first double-rope rappel from the bolted rappel station at the top of the final pitch. When the climbers went to pull their ropes after the first rappel, the rope would not budge. After repeated attempts to pull the ropes down, the climbers considered themselves to be stranded and used a cell phone to contact rangers.

DEC ranger Robbi Mecus was able to talk to the subjects via cell phone and instruct them. She determined that the subjects still had both ends of the rope, and that it would be possible for one of them to use prusiks to climb the ropes back to the anchor. However, the climbers did not have prusik loops and were unfamiliar with techniques for ascending a rope. Mecus was able to coach the climbers by phone on how to use their sewn slings as prusiks. She then instructed them to create two prusik loops: one short one attached to the harness and one long one as a foot loop. She also instructed them to tie in to the ropes directly every few feet as a backup should the prusik attached at the waist fail. The climbers completed one round of practice with Mecus on the phone, and then one of them prusiked to the top of the climb to free the rope from the crack in which it had been stuck.  

Mecus instructed the subjects to pull the knot joining their two ropes down past the obstruction and place a nut in the crack to prevent another stuck rope. They were able to retrieve their ropes and finish their descent. She stayed on the phone with the subjects while she herself approached the cliff to ensure the subjects were following her directions. The subjects had left their headlamps in their packs at the base of the cliff, not expecting to be caught in the dark. This oversight exacerbated the situation. Mecus then assisted the subjects across the west branch of the Ausable River and back to the trailhead.

ANALYSIS

More people are learning to climb in the gym or on sport routes. Thus, they can become stronger climbers much faster than in the past, without learning the foundational skills associated with outdoor traditional climbing. These climbers were very capable, successfully climbing a four-pitch 5.9+ trad route, but were not familiar with the relatively basic rope ascension techniques they needed to ascend and free the rope.  

Investing in self-rescue skills is an important part of transitioning from gym to crag. These can be learned through mentorship (informally or with a guide), through self-rescue courses, or even by reading a book or watching YouTube videos on self-rescue. A few minutes invested in learning and practicing how to ascend a rope with prusiks would have prevented the need for the rangers to be called. The climbers were right to have brought a cell phone and used it to call for help. Had they been unable to receive help by phone, the climbers’ situation would have turned significantly more dire, as they would have been stuck several hundred feet up the face for the night or longer.

As this incident demonstrates, you never know when you may be unexpectedly delayed. The climbers in this incident did not have headlamps and were unprepared to be out after dark. As a general precaution, always bring a headlamp when multi-pitch climbing. Stashing a small headlamp in the bottom of a chalk bag is a great way to ensure you always have one with you.  

(Sources: New York State Department of Environmental Conservation Forest Rangers and the Editors.)

FaceTime and SARTopo

Mecus used FaceTime to communicate with the climbers and visually demonstrate techniques, as she has on other rescues. She recalls one such incident: “A hiking party with an injured individual (dislocated finger) was asking for a ranger to hike out to them. I was able to look at the injury (via FaceTime) and with a good interview determined it was dislocated. I instructed them how to reduce the dislocation, sling and swath the arm, and walk themselves out. Pretty simple.”

Mecus uses other technologies to help people get themselves out of trouble in the mountains and woods—technologies that help conserve precious ranger resources. She says, “With better cell phone coverage comes the ability to send a lost person a link to a SARTopo application. This allows us to see them on a map as they move.” SARTopo, a version of CalTopo, is a widely used, collaborative online and offline mapping tool; the program name SARTopo is being phased out in favor of CalTopo.

For background on SARTopo (CalTopo), click here.

For a consumer overview of SARTopo (CalTopo) and a how-to tutorial, click here.

While cell service has improved in recent years deep in the Adirondacks, you can’t count on a phone in remote areas and should still carry an inReach or other satellite-based communication device. Nonetheless, Mecus says, “Within the past seven or eight years, certain spots on Wallface, our tallest and most remote wilderness cliff, can hit a cell tower. Wallface is six miles from the nearest trailhead and 800 feet tall. A few years ago, we had a seriously injured climber hanging on pitch two of an eight-pitch 5.8 after taking a 60-foot fall. Their friend on the ground was able to find cell service and call dispatch. We were able to insert myself and a volunteer climber via helicopter at the base, climb up to the party, package and lower the subject to the ground, and perform a helicopter hoist extraction. The climber was in the hospital within five hours of his accident. Without the improved cell coverage, he would’ve been hanging suspended on the cliff all night. I'm not sure he could've survived his injuries.”

Read the ANAC report from the Wallace incident here.

Join the Club—United We Climb.

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Partner-level members receive the Accidents in North American Climbing book every year. Detailing the most noteworthy climbing and skiing accidents each year, climbers, rangers, rescue professionals, and editors analyze what went wrong, so you can learn from others’ mistakes.

Rescue & Medical Expense Coverage

Climbing can be a risky pursuit, but one worth the price of admission. Partner-level members receive $7,500 in rescue services and $5,000 in emergency medical expense coverage. Looking for deeper coverage? Sign up for the Leader level and receive $300k in rescue services.

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