How to Master Therm Release Techniques in Mountain Paragliding: Stop Fighting Air, Start Soaring

Note: This guide is for intermediate to advanced paragliders with at least 50 hours of mountain flight experience. Therm release techniques carry elevated risk in rugged terrain, and this content is not intended for student pilots or new flyers.

Last summer, I was 800ft above a larch forest in the French Alps, 12km into a planned 50km cross-country route, when I realized I'd made the worst mistake of my paragliding career: I'd let myself get sucked into the core of a gnarly 3m/s thermal I'd spotted 2km out, and I had no clue how to exit it without losing half my altitude. I yanked my brakes hard to turn out of the rising air, my wing stalled for half a second, and I dropped 250ft in 10 seconds, staring down at treetops so close I could see the pine needles. I only leveled out at 100ft above ground level, and spent the next 20 minutes gliding to a random farmer's field to land, my harness still reeking of pine resin from the near-miss.

That day, I promised myself I'd stop fighting mountain thermals, and start mastering the release techniques that turn turbulent, unpredictable mountain air from a fatal hazard into a tool for longer, smoother flights. If you've ever found yourself dumping altitude to escape a thermal, or avoiding mountain cross-country routes entirely because you're scared of unexpected lift, this guide is for you.

First: What Even Is a Mountain Therm Release?

Forget the generic "turn away from the lift" advice you got in your beginner course. In mountain paragliding, a therm release is the intentional, controlled transition from climbing in narrow, slope-fed, wind-sheared rising air to smooth, efficient gliding flight, with minimal altitude loss, no stalls or spins, and zero risk of being pushed into cliff faces, ridges, or forested valleys.

Mountain thermals are nothing like the wide, predictable bubbles you get over flat farmland. They're tied to sun exposure on south-facing slopes, wind shear off ridgelines, and daily valley wind cycles, which means they're often narrow, fast-moving, and tangled up with turbulent ridge lift. A bad release in this terrain doesn't just cost you altitude---it can put you directly into a rotor zone or a cliff face in a matter of seconds.

3 Mountain-Specific Therm Release Techniques (Ranked By Use Case)

These are the exact techniques I've used across 200+ mountain flights in the Alps, Dolomites, and Drakensberg, tested in everything from light 1m/s lift to gnarly 4m/s core thermals. Pick the one that matches your altitude and terrain, not the one you remember from a generic paragliding video.

1. Core Drift Exit (For Moderate Thermals Above 1500ft AGL)

This is your go-to for 90% of mountain thermals, and it's designed to get you out of lift with less than 50ft of altitude loss, no hard turns required. Step-by-step:

1. First, stop your centering turn in the thermal. Straighten your wing fully, keep your brakes at neutral to let your glide speed build to your normal mountain flying speed (usually 35--45km/h for most EN-B and EN-C wings).
2. Identify the thermal core: if you were climbing 0.5--1m/s faster when you were turned to one side, or your wing was pulling harder to one side, that's the core side.
3. Apply a tiny, 5cm brake input on the side opposite the core to drift slowly away from the rising air---no sharp turns, just a gentle drift.
4. Once your vario stops beeping for climb and drops to 0 or slight sink, slowly reapply both brakes to pick up 5--10km/h of extra speed, then level out and fly straight.

Pro tip: If you're flying near a ridgeline, always exit away from the ridge first. Ridge lift almost always merges with slope thermals, so drifting away from the ridge first ensures you're not escaping one thermal just to get sucked into an even stronger, more turbulent one tied to the ridge.

2. Low-Altitude Brake Steepen (For Thermals Below 1000ft AGL)

This is the life-saving technique I used to avoid crashing into a cliff in the Drakensberg, and it's non-negotiable for valley flying where turns at low altitude can put you directly into terrain. Unlike the core drift exit, this uses no turns at all, which eliminates the risk of misjudging a turn radius near obstacles. Step-by-step:

1. Do not turn. Ever. Turning at low altitude in a mountain valley reduces your glide ratio and can push you into cliff faces, rotor, or treetops if you misjudge your turn path.
2. Apply a steady 10--15cm brake input on both sides to steepen your glide angle by just 2--3 degrees---just enough to fly out of the rising air mass, but not so much that you approach stall speed.
3. Once your vario stops beeping for climb, slowly release the brakes back to neutral, let your speed build back to your normal flying speed, and fly straight.

You'll lose less than 30ft of altitude using this technique, even if you're flying at 750ft AGL next to a 200ft cliff. I've used it at least 8 times in the last two years, and it's never failed me.

3. Wind-Aligned 180 Exit (For Strong, Narrow Thermals Tied to Ridges)

This is for when you're stuck in a tight, fast-climbing (3m/s+) thermal right next to a ridge, and the core drift exit won't get you out fast enough. The key here is to use wind direction to your advantage, so you don't get pushed back into the thermal or the ridge. Step-by-step:

1. Check the wind direction first: use your wind instrument, or look at the drift of dust, birds, or other gliders below you to confirm the wind direction.
2. Turn 180 degrees away from the wind direction, so you're flying directly downwind, away from the ridge.
3. Apply a small amount of brake on the outside of the turn to keep your turn radius wide, so you don't dip towards the ridge or into the thermal's core.
4. Once you're 100m away from the ridge, level out, let your speed build, and you'll be clear of both the thermal and the ridge's turbulent lift.

Pro tip: Never turn into the wind when exiting a ridge thermal. You'll just climb deeper into the turbulent core, and lose twice as much altitude trying to get out later.

4 Mistakes That Will Get You In Trouble (I've Made All Of Them)

If you're still struggling with therm releases, you're probably making one of these common, costly mistakes:

1. Over-braking on exit : I see new mountain pilots do this all the time---they panic when they feel the thermal pulling them up, yank the brakes hard to turn out, and stall their wing. The rule of thumb is: never apply more than 50% total brake when exiting a thermal, unless you're using the low-altitude steepen technique, and even then, max 15cm of brake per side.
2. Ignoring your altitude : If you're above 2000ft AGL, you have time to use the core drift exit, pick up speed, and even find a better thermal if you want. But if you're below 1000ft, forget the turns entirely---use the steepen technique, no exceptions.
3. Milking weak thermals : If your climb rate is less than 0.5m/s, it's not worth staying in. Weak mountain thermals are almost always turbulent, and you'll waste more time fighting them than you'll gain in altitude. Exit, and look for stronger lift elsewhere.
4. Not checking wind direction before exiting : If you exit a thermal into a 20km/h headwind, you'll lose 10km/h of groundspeed, and if you're near a ridge or cliff, that can put you directly into terrain before you have time to react.

Practice Drills To Make These Techniques Second Nature

You don't want to be fumbling for the right technique when you're 800ft above a forest. Practice these drills before your next mountain flight to build muscle memory:

1. Ground drills : Lay your wing out on a flat field before every flight, and practice the core drift exit motion 50 times: straighten your brakes, apply a tiny bit of brake on one side, then release. This builds the muscle memory so you don't have to think about it when you're in the air.
2. Low-altitude practice flights : Find a wide, flat, obstacle-free area (like a large dry lake bed, or a big open alpine meadow) on a sunny day, fly at 500ft AGL, and intentionally enter small, weak thermals (you can spot them by dust devils or circling birds) and practice the low-altitude steepen technique. Get a feel for how much brake input you need to exit without stalling, without the risk of terrain.
3. Altitude check drills : Every 30 seconds during flight, tap your altimeter and note your AGL, so you automatically know which release technique to pull without having to think. Most new pilots forget to check their altitude when they're focused on a thermal, but this drill makes altitude awareness second nature.

The Bottom Line

When I first started mountain flying, I avoided thermals entirely, sticking to ridge lift and losing hours of potential cross-country distance because I was scared of getting stuck. Now, I use thermals to gain 1000ft of altitude in 2 minutes when I need to cross a 5km valley, and exit them smoothly without losing more than 30ft of altitude, every single time.

The difference isn't magic---it's practice, and knowing which technique to use for the situation you're in. Next time you're soaring above a mountain range and feel that familiar pull of rising air, don't panic. Check your altitude, check the wind, pick your exit technique, and you'll be gliding smoothly in no time. Just don't yank the brakes like I did in the Alps. You'll thank me later.