Multi-day aid is mostly logistics: how you stand on gear, how you haul, how you sleep, and how you get off the wall if the weather or the rack says no.
Multi-day aid is logistics: how you stand on gear, how the second jugs and cleans, how the pig comes up, how you sleep, and how you get off if the weather or the rack says no. Free climbing the same rock is a different sport.
This page is the wall workflow. Haul math lives on Hauling. Lead-solo walls still use the lead-solo start-anchor and backup rules.
Big wall and aid climbing require extensive gear, far beyond a normal rock climb. "The management of more items than contained in a small mountain shop can be a considerable task in itself," notes legendary big-wall pioneer John Middendorf.

A climber's harness loaded with an extensive big wall aid rack, including dozens of carabiners, cam devices, and aid ladders. Big wall climbers carry multiple sets of protection and many specialized items to address varied crack sizes and challenges.
Two jobs: the leader advances the high point; the second jugs, cleans, and often hauls. Efficiency is not speed-climbing. It is not dropping the pig and not taking a pendulum you did not plan.
As gear and ethics have evolved, a major distinction in aid climbing is "clean" aid versus "nailing". Clean aid has become the preferred style on almost all established routes today because it minimizes impact on the rock.
Clean aid means ascending using gear that does not damage the rock – no hammering of pitons or copperheads, and no drilling of holes. Instead, climbers use removable protection like nuts, cams, cam hooks, and hand-placed piton variants, relying on natural features.
It's essentially aid climbing without bolts, pitons or any gear that scars the rock or remains fixed. For example, instead of hammering a piton into a crack, a clean aid climber might place an offset micro-cam or a tiny nut in the same spot.
The Yosemite climbing community in the 1970s pioneered this clean climbing ethic: climbers like Royal Robbins and Yvon Chouinard advocated leaving no trace (Chouinard famously introduced aluminum chockstones to replace pitons). Guidebooks use the rating "C" (C1, C2, etc.) to indicate clean-possible aid grades. Climbing a pitch at C2 means it can be done clean at that difficulty.
The push for clean climbing has driven innovation in gear. For example:
All these tools mean that nail-ups are rarer, and most classic routes go clean. In fact, many areas (like Zion National Park or Arches in the U.S.) explicitly require clean techniques – their sandstone is soft, and regulations forbid piton use except in emergencies.
Clean aid requires a careful eye for identifying natural features that can accept protection. This means looking for:
Sometimes a single piece isn't secure enough. Clean aid climbers will often "stack" pieces - placing multiple pieces in the same area that work together. For example, placing two offset nuts that oppose each other in a flaring crack can create a more secure placement than either piece alone.
Testing clean placements is crucial but requires care. The climber must be prepared to catch themselves on their previous piece if the tested piece fails. This typically means:
Clean aid still pendulums. If the leader went sideways, the second lower-outs from the directional — they do not unclip it first. Numbered sequence: Big Wall Techniques (lower-out) and the diagram on this page.
Clean aid is rated using the "C" scale:
This is in contrast to the traditional "A" rating system, which assumes hammered protection might be used. Many formerly A4/A5 routes have been downgraded to C4/C5 as gear improved and climbers found ways to do them clean.
Hammered gear is the wrong tool on a pitch that goes clean. Use this tab when a guidebook still says A, when a fixed head is gone, or when you are deciding to retreat instead of creating new scars. It is not a style menu.
Nailing refers to using a hammer to pound in protection – pitons, blades, angles, copperheads (which are literally hammered into tiny seams), and even drilling anchors if needed. This was the original aid method in the golden age of big walls (1950s-60s): climbers carried a rack of pitons and a hammer and nailed their way up, piece by piece.
Nailing is slow and labor-intensive – each piece must be pounded in and often arduously removed (sometimes left fixed). It also causes physical damage to the rock, widening cracks and leaving pin scars. Because of this, nailing is now typically a last resort.
Most modern climbers will only place pitons or heads if no other clean gear will work. On some extremely hard aid lines (A4 or A5 grade), clean placements might simply not exist, and nailing may be unavoidable – these routes retain the "A" (for "artificial") rating.
Many formerly A4/A5 routes have been downgraded to C4/C5 as gear improved and climbers found ways to do them clean. That said, big wall climbers sometimes still carry a hammer on a clean climb "just in case" – if a crucial cam gets stuck, a hammer tap might free it; or if an essential fixed piece has fallen out, they can hammer in something to get through.
Pitons are metal spikes that are hammered into cracks. Common types include:
Copperheads are small, soft metal blobs on the end of a cable. They are hammered into small features until the soft metal conforms to the rock. These are essentially single-use and must be abandoned, though they're often left in place on established aid lines.
In extreme cases where no natural features exist, climbers historically drilled holes and placed expansion bolts. Modern ethics strongly discourage placing new bolts on established routes, and many areas have explicit regulations around bolting.
Placing pitons effectively requires technique:
Extracting pitons can be challenging:
Placing copperheads is an art form:
Traditional aid climbing is rated on the "A" scale:
The distinction between "A" and "C" ratings indicates whether hammered gear is required (A) or if the route can go entirely clean (C).
The decision to nail has a serious ethical dimension: adding new piton scars or fixed heads can permanently alter a route. The prevailing ethic is:
Using modern gear creatively is seen as a mark of skill, whereas resorting to the hammer is a last ditch effort. Many climbing areas have explicit regulations regarding hammered gear - be sure to know and follow local ethics.
The pig is a second climber that does not help. Static haul line. Progress-capture at the high anchor. Dock before you start the next lead. Use a rope rated for the job (EN 1891 low-stretch for dedicated haul lines). Do not haul on a chewed lead rope over a sharp lip if you have a choice.
Full page: /hauling. Petzl pulley notices apply to the device on the anchor — read the sheet for Pro Traxion / Micro Traxion before you copy a photo.
On multi-day big wall climbs, the portaledge becomes both your refuge and your home. Learning to live efficiently on the wall is as important as mastering aid climbing techniques.
The portaledge setup process requires practice to master, especially in challenging conditions:
Most portaledges have specific setup sequences that become more intuitive with practice. Setting up in calm conditions at a ground-based practice area before attempting on a wall is strongly recommended.
Getting good rest is crucial for multi-day performance:
Most climbers use custom-cut foam pads that exactly fit the portaledge dimensions. Inflatable pads can work but risk punctures. Many big wall veterans prefer closed-cell foam pads for their reliability. For maximum comfort, some climbers bring both a thin closed-cell pad as a base layer and a thicker foam pad on top.
Temperature-appropriate sleeping bags are essential. Many climbers opt for lightweight down bags with water-resistant shells for the best warmth-to-weight ratio. Always clip your sleeping bag to the portaledge so it can't accidentally fall off the edge.
Always remain tied in while sleeping on a portaledge. The standard practice is to:
Water is the heaviest item you'll carry. Plan for:
On walls with forest bases (like Yosemite), some climbers will fix ropes to the ground and rappel down to refill water, then jumar back up - saving significant weight.
Efficient food is:
Popular big wall foods include: dehydrated meals, nuts, jerky, cheese, tortillas, energy bars, and chocolate. Bring extra food for weather delays, and plan meals that can be eaten cold if necessary.
Proper waste management is essential from both an ethical and practical perspective:
The standard method is using a "poop tube" - a PVC tube with caps at both ends. Line the tube with a plastic bag, use it, then seal and store the waste until you descend. In many climbing areas, proper human waste disposal is mandatory.
Use a dedicated waste bag for all other trash. Pre-removing excess packaging before the climb reduces what you'll need to pack out. Never drop anything from the wall - even biodegradable items.
Being prepared for unexpected weather events is critical for safety and comfort:
When bad weather hits:
High winds are common on big walls. To cope:
Big wall and aid climbing involve inherent risks beyond those found in normal rock climbing. Understanding and managing these risks is essential for a successful and safe ascent.
Being on a wall for multiple days increases your vulnerability to environmental hazards:
Mitigation: Check detailed weather forecasts before starting, bring appropriate clothing for temperature swings, carry extra water, use sun protection, and have a contingency plan for unexpected storms.
The complexity and quantity of gear used in aid climbing increases the risk of equipment problems:
Mitigation: Inspect all gear thoroughly before the climb, retire worn equipment, place protection conservatively, build redundant anchors, use rope protectors, and backup critical systems.
Aid climbing falls can be particularly dangerous:
Mitigation: Place solid protection when possible, avoid bounce testing marginal gear when you're high above your last good piece, use helmets, and maintain awareness of fall zones and potential pendulums.
Big wall anchors need to be exceptionally strong and redundant:
Complex rope systems require careful management:
Always maintain at least two points of connection to the wall:
Know how to handle common emergency scenarios:
In today's world, technology can provide a safety margin:
Tailor your medical kit to big wall-specific concerns:
The psychological challenges of big walls affect safety:
Mitigation: Establish clear turn-around criteria before starting, make major decisions when rested, constantly reassess risk vs. reward, and practice clear communication with partners.
Effective communication is critical for safety:
No invented interviews. The names below are attached to public, checkable work. The lists are ordinary wall practice, not attributed quotes.
Hauling, ledge deployment, and anchor building need to be automatic before you leave the ground. John Middendorf designed widely used portaledges; the lesson from that whole generation of wall hardware is the same: know the system on the valley floor, then break the wall into pitches instead of staring at the whole face.
Yvon Chouinard and Tom Frost documented the shift toward nuts and later cams so routes could be protected with less piton damage. Clean aid still means matching the piece to the placement and testing it before you weight the aider — not assuming modern gear makes the rock optional.
Fast parties are organized: rope stacks, haul-bag orientation, who is on what device, and a call for every transition. Hours disappear in messy changeovers, not in the middle of a pitch. Lynn Hill's free ascent of The Nose is public record; the transferable part is discipline at the stance, not the free-climbing grade.
Slow down. Place more. Test every piece. Move one aider at a time. Marginal aid is not the place to invent a new sequence under fatigue.
Multi-day walls have a predictable low after the novelty wears off and the summit is still days away. Pitch-by-pitch goals and a written bail plan beat vague summit thinking. Conrad Anker and other expedition climbers have said the same thing in public for years: know how you get off, and assume rescue is slow.
The learn page has a mistakes list and a quiz built from this guide. A high score is not training.
Other systems this page assumes or hands off to.