The single biggest mistake trail runners make on climbs is trying to hold their flat-ground stride. As the gradient rises, shorten your stride, raise your cadence toward 170 to 180 steps per minute, and lean slightly forward from the ankles rather than bending at the waist. Your foot should land underneath your hips, not way out in front, so each step pushes you forward instead of braking. This one change alone makes most runners noticeably faster uphill within a few weeks.

Your arms are the metronome of your climb. Drive your elbows back with purpose and keep the swing compact, with hands no higher than your chest. When your arms speed up, your legs follow, and when your arms go slack, your stride usually collapses too. On steep pitches, a slightly more vigorous arm drive can carry you through sections where your legs want to quit. Keep your shoulders relaxed and down; shrugging wastes energy you need for the climb.

Breathing rhythm matters more on hills than on the flat because the effort spikes quickly. Lock into a pattern such as two steps breathing in and two steps out for hard efforts, or three and three for moderate climbs. If you cannot hold the pattern, you are going too hard and should back off or switch to a hike. Runners who breathe on rhythm almost always pace climbs better than runners who breathe raggedly and surge.

Know when to stop running and start power hiking, because on steep gradients hiking is genuinely faster and cheaper. A good rule is that if the slope rises above your eye line when you look straight ahead, hiking will beat shuffling. Power hike with purpose: lean in, push your hands into your thighs on the steepest parts, and keep your cadence brisk rather than strolling. Elite trail racers hike plenty, so there is no shame in it.

Train climbs deliberately once a week rather than only suffering through them on long runs. A simple session is six to eight repeats of two minutes uphill at a strong but controlled effort, jogging easily back down. Over four to six weeks, extend the repeats or add a couple more. Hill repeats build the calf, glute, and quad strength that flat running never touches, and they teach your body the shorter, quicker stride that climbs demand.

Finally, practise the crest. Most runners collapse over the top of a hill and lose seconds they just earned. As the gradient eases, lengthen your stride gradually, relax your arms, and let gravity help you accelerate into the descent or flat. Running the crest well is free speed, and in a race it is often where you pass people who climbed just as fast but recovered poorly.

Hill technique improves fastest when paired with strength work. Single-leg step-ups, Bulgarian split squats, and calf raises done twice a week build the exact muscles that drive you uphill. Eccentric calf lowers, lowering slowly from a raised position over three seconds, are especially valuable because they prepare your calves for the braking load of descents that follow climbs. Stronger legs mean you can hold good climbing form late in a run, when tired runners usually collapse into a shuffle.

In a trail race, the climb is where most runners destroy their race by starting too hard. Run the first third of a long climb slightly easier than you think you should, hold steady through the middle, and push only on the final third and the crest. Use a heart-rate or effort ceiling: if you cannot speak a short sentence, you are above threshold and will pay for it later. Walking the steepest pitches early in a race is not weakness; it is pacing, and it often produces a faster finish time than running everything and walking the final miles.

On very steep or technical climbs, trekking poles can save your legs. Poles transfer some of the climbing load to your arms and improve balance on loose ground, which is why they are standard in European mountain races. If you use poles, practise with them in training first, learning the plant-and-push rhythm before race day. Also consider shoes with deeper lugs for muddy climbs and a snug heel fit, since heel slip on steep gradients wastes energy and raises blister risk.