Figure Eight Knot Climbing: How to Tie (September 2026)

I learned to tie a figure eight knot the way most climbers do: standing in a gym while an instructor barked at me about tail length and parallel strands. Years later, after dozens of lead falls and a few thousand pitches, I still tie it the same way - slowly, deliberately, with a partner checking my work. That habit has kept me on the wall. In this guide I'll walk you through exactly how to tie a figure eight knot for climbing, including the version most instructors actually teach (the figure 8 follow-through, also called the rethreaded figure 8), how to dress it so it doesn't jam, and how to make sure it's safe before you leave the ground.

By the end you'll know the seven steps, the visual checklist that catches 95 percent of mistakes, and how to untie cleanly after a hard fall. If you want a deeper dive into knot-tying tools for your gear bag, our knot-tying tools roundup covers some helpful accessories. We also have a guide to nail knot tools if you want to round out your rope skills.

What the Figure 8 Follow-Through Is (And Why Climbers Trust It)

The figure 8 follow-through (also called the rethreaded figure 8 or retraced figure 8) is the standard knot climbers use to tie the rope into their harness. It is widely considered the safest, most inspectable tie-in knot in climbing, and it's the first knot taught in every beginner course.

There are good reasons for that. A correctly tied figure 8 retains about 75 to 80 percent of the rope's strength, which is plenty for absorbing lead falls. It's self-cinching under load, takes only two complete motions to untie after being weighted, and it is extremely easy to verify with a quick glance - five parallel strands, a 6-inch tail, snug against the harness. The American Mountain Guides Association (AMGA) recommends the figure 8 follow-through without a backup knot when it's tied correctly.

For beginners, the visual inspectability is the real win. Unlike a bowline, where a missed tuck can silently reduce strength, the figure 8 either looks right or it doesn't. Your partner can check it from across the room. That single feature has prevented countless accidents, and it's the main reason the figure 8 has been the universal tie-in knot for over 50 years.

What You Need Before You Tie In

You only need two pieces of gear to tie in: a dynamic climbing rope and a properly fitted climbing harness. If you have both, you're ready.

Your harness has two tie-in points at the front - reinforced webbing loops (or metal buckles on some newer models) that sit low on your waist. These are NOT the same as the belay loop, which is the rigid loop higher up that connects to your belay device. Always tie through both tie-in points. Tying only through the belay loop is one of the most dangerous mistakes a beginner can make, because a single belay loop failure would result in a ground fall with no backup.

For the rope, use a dynamic single rope between 9.0 and 10.2 mm for most gym and sport climbing. The knot works the same on any diameter. Before you start, pull about 3 to 4 feet of rope through your tie-in points to give yourself room to work. The end of the rope you're tying with is called the tail or working end; the long section going to your belayer is the standing part.

Quick Steps: Tie a Figure 8 in 7 Steps

If you just want the steps, here they are. Each step is detailed below in the full walkthrough.

1. Form a figure 8. Make a loose figure 8 in the rope about 3 feet from the end.
2. Pass the tail through both tie-in points. Thread the working end down through both harness tie-in points from the bottom up.
3. Retrace the figure 8. Follow the original figure 8 in reverse back alongside itself, tracing parallel to each strand.
4. Leave at least 6 inches of tail. A short tail can slip; 6 to 8 inches is the safe minimum.
5. Dress the knot. Pull each strand tight and arrange the five pairs of parallel strands so nothing crosses.
6. Set the knot. Clip the rope above the knot and have your belayer take in so you can pull the knot snug against your harness.
7. Partner check. Have your belayer verify: five parallel strands, 6-inch tail, snug against the harness, no twists.

Step-by-Step: How to Tie a Figure Eight Knot for Climbing

Now let's slow it down. Tie it with me. Most climbers learn faster by tying along with the instructions rather than reading passively.

Step 1: Form the Initial Figure 8

Take the working end of the rope in your dominant hand and make a small loop, then pass the rope around and back through the loop to form a loose figure 8. Imagine drawing the number 8 in the air with the rope, crossing once in the middle. The knot should be loose and recognizable - if you can't see the 8 shape, you tied it wrong.

Keep the knot about an arm's length plus a shoulder from the end of the rope. That gives you enough tail to retrace and still leave 6 inches hanging out at the end. If you start too close to the end, you'll run out of tail before the knot is finished.

Step 2: Thread Through Both Tie-In Points

Pass the working end of the rope up through both tie-in points on your harness, from the bottom up. Both points, in order - don't skip one. The rope should come out of the top tie-in point ready to retrace.

This is where beginners often make their first mistake: they thread through the belay loop instead of the tie-in points. The belay loop is the rigid, gear-loop-adjacent loop above the tie-in points. Don't use it for the figure 8. Always go through the two soft tie-in points at the base of the harness.

Step 3: Retrace the Figure 8 in Reverse

Now follow the original figure 8 backward, threading the tail alongside each strand of the original knot. You're essentially tracing the original figure 8 in mirror image - down one strand, around the bottom, up the other side, and back through the middle.

Here's the trick that experienced climbers use: think "start hard, finish easy." Tie into the non-obvious side of the knot first - the side that requires you to reach around or twist your wrist. Once that side is threaded, the rest of the retrace falls into place naturally. Trying to do it the other way almost guarantees you'll cross a strand.

Step 4: Leave at Least 6 Inches of Tail

Stop when you have at least 6 inches (about 15 cm) of tail sticking out of the end of the knot. Eight inches is even safer. This tail is critical - under extreme loads, a properly tied figure 8 can slip a small amount before the strands lock up, and the tail is what prevents a catastrophic unraveling.

Beginners frequently come up short on tail because they start their figure 8 too close to the end of the rope. If your tail is less than 6 inches, untie and start over with more rope. Never climb on a short tail.

Step 5: Dress the Knot (See Next Section)

Pull each strand tight by hand and arrange the knot so all five pairs of strands lie parallel. No crossings, no twists. This is called "dressing" the knot, and it deserves its own section below because it is where most beginners produce ugly-but-functional knots that still pass inspection.

Step 6: Set the Knot Against the Harness

With your knot dressed but not yet tight against the harness, ask your belayer to take in slack. Pull the standing part of the rope to snug the knot up against the tie-in points. The knot should sit flat against your body, with no big loops of slack above or below it.

If you skip this step and climb with a loose knot, the knot can shift and roll during a fall, which both feels sketchy and can momentarily reduce the knot's effective strength while it re-settles.

Step 7: Partner Check

Before you leave the ground, your belayer does a 30-second visual check of your knot. We cover the exact checklist in the buddy check section near the end of this article. If your partner sees anything off - a crossed strand, a short tail, the knot riding too low or too high - they call it out and you fix it before climbing.

I've personally caught at least three badly tied figure 8s on partners over the years, including one where a strand was twisted 180 degrees and would have held for a moment before failing under a hard fall. That partner check is the reason we're all still climbing.

How to Dress and Tighten the Knot the Right Way

Dressing a knot means arranging the strands so they're tidy, parallel, and free of twists before you load it. An undressed figure 8 is still strong, but it's harder to inspect and easier to get wrong without noticing.

To dress your figure 8, start at the harness and work outward. Pull each pair of strands taut and stack them so they lie flat and parallel. You should see five distinct pairs: one going up to the harness, two forming the upper loops, two forming the lower loops, and the tail. If any strand crosses another, untie and start over. Crossed strands are a sign that you threaded through the wrong hole or retraced in the wrong direction.

The "five parallel strands" rule is the single most useful inspection cue. Once you've tied a correctly dressed figure 8 a few times, you'll be able to spot a mis-tied one in under a second - and so will your partner.

Stopper Knot or No Stopper Knot?

The AMGA's official position is that a correctly tied figure 8 follow-through does not require a backup or stopper knot. The knot is self-cinching and stable on its own.

That said, many gyms and some instructors require a backup. If you're at a gym that mandates one, the two common choices are:

Double overhand stopper knot: Tie a simple overhand knot in the tail, just below the figure 8. Quick, easy, and most common for gym use. Downside: it adds a small bump that can catch in the air.

Fisherman's knot (double overhand bend): A more secure backup that wraps the tail around the standing part twice. More time-consuming but stays put better if the figure 8 ever slips. Recommended by some old-school instructors.

Outside of gyms that require them, I don't add a backup. Adding a stopper knot to a correctly tied figure 8 is belt-and-suspenders thinking. If the figure 8 is bad enough to need a backup, it's bad enough to untie and retie.

How to Untie a Figure 8 After a Fall

Untied a figure 8 after a hard lead fall and you'll know exactly what "jammed" means. The knot cinches down hard, and beginners often spend five minutes wrestling with it at the next stance.

Here's the trick: keep the load strand (the strand that was bearing weight during the fall) on the inside of the knot. When you pull it inward, the knot relaxes and unthreads in two motions - reverse the retrace, then pull the original tail out. If the load strand ended up on the outside, you'll be fumbling for much longer.

Wet, icy, or muddy ropes make this much worse. If you know you're climbing in alpine conditions, accept that untying will be slow. Don't yank or pry the knot with metal - you'll damage your rope. Work it free with your fingers.

Common Mistakes Beginner Climbers Make With the Figure 8

After years of watching new climbers tie in, I've seen the same handful of mistakes over and over. Avoid these and you're already ahead of most beginners.

Tying through the belay loop. Most dangerous mistake. The figure 8 must go through both tie-in points. If your partner notices this, stop climbing immediately and retie.

Crossed or twisted strands. Caused by threading through the wrong side of the figure 8 first, or twisting the rope during the retrace. Fix: start over. There is no field repair for a crossed-strand figure 8.

Short tail. Less than 6 inches sticks out of the end of the knot. Retie with more rope. A short tail can theoretically slip under extreme loads, though it's rare with modern ropes.

Loose, undressed knot. The knot hangs off the harness with slack loops. It works, but it can shift during a fall and is harder to inspect. Always dress and set the knot before climbing.

Talking while tying. Distraction is real. VDiff Climbing and several instructors specifically call this out: don't chat, don't check your phone, don't respond to questions mid-tie. Finish the knot, then engage.

Skipping the partner check. Beginners sometimes feel awkward asking their belayer to verify. Do it anyway. Every single time. The check takes 30 seconds and is the single most reliable safety net you have.

Figure 8 Follow-Through vs Bowline vs Figure 8 on a Bight

Bowline vs figure 8 is one of the most common knot questions on climbing forums. Here's the short version.

The figure 8 follow-through is the standard tie-in knot for almost all modern climbing. Strong, easy to inspect, easy to teach.

The bowline is a slightly stronger knot historically used in climbing, but harder to tie correctly and easier to mis-tie in ways that aren't visible. Most climbing organizations have moved away from it for tie-in. It still has uses elsewhere (rescue, sailing), but for climbing harness tie-in, use the figure 8.

The figure 8 on a bight is a different knot entirely - it's a fixed loop tied in the middle of a rope, used for things like attaching to an anchor or as a stopper knot. It is NOT a tie-in knot. If someone tells you to "tie in with a figure 8 on a bight," they mean the figure 8 follow-through. The two names are a common source of confusion in online searches.

Pre-Climb Buddy Check: The 30-Second Visual Inspection

The buddy check is the last step before you leave the ground. It catches almost every mistake, including the ones you didn't notice while tying. Run through this checklist every single time:

Five parallel strands. Five pairs of strands lying parallel at the knot. No crossings, no twists.

Six-inch tail. At least 6 inches (8 is better) of rope sticking out past the end of the knot.

Snug against the harness. The knot sits tight against both tie-in points, not hanging loose.

Tied through both tie-in points. Confirm the rope passes through both harness tie-in points, not the belay loop.

Harness buckled. Double-back the waist buckle and the leg loop buckles. Slack webbing is a fall waiting to happen.

Helmet on. Both climber and belayer. Every climb.

That checklist takes 30 seconds and should be a habit from your very first gym session to your hundredth multi-pitch route. It's not optional, and it's not overkill. It's the system that has kept thousands of climbers alive.

Frequently Asked Questions

Final Verdict

Learning how to tie a figure eight knot for climbing is the most important skill in the sport. It is the knot that physically connects you to the rope system, and a clean, dressed figure 8 with a 6-inch tail and a partner check is the difference between a safe climb and a dangerous one.

Tie it slowly, dress it carefully, and never skip the buddy check. If you only remember one rule from this guide, make it this: every figure 8 gets a partner verification, every single time, no exceptions. Whether you're on your first gym lead or your hundredth alpine pitch in 2026, the same knot and the same habit keep you alive. Now go tie in, get your partner to check your work, and enjoy the climb.