In 2022, a friend told me to come run in Bir. I did not yet know what a trail run was. I knew Bir as the paragliding place. Bright sails against the Dhauladhar, prayer flags at the take-off site, pine and woodsmoke in the air. He said the trails there change you. He was not wrong.
The festival, in one breath
Bir, Himachal Pradesh. October. A trail running festival in India's paragliding capital. The routes wind through Himachal valleys, monasteries appearing around bends, the sound of bells carried on mountain wind. The category for this race is trail. Which means the road never gets to make the rules. The mountain does.
Training for Bir is not training for a road marathon with hills thrown in. It is its own discipline. Climbing, descending, breathing thinner air, picking lines through roots and stones. These are skills. They have to be learned, not assumed.
I have watched fit road runners arrive in Bir confident and finish humble. I have also watched first-time trail runners with patience finish strong. The trails do not care about your road PB. They care about how you move.
A note before you train
Read the India weather guide before you build your plan. October in Bir is post-monsoon. Clearer skies, cooler temperatures. But the trails can still hold moisture and mud in the early weeks. The weather you train in is not the weather you race in.
The build, week by week, conceptually
Think of the plan in four phases. Base. Hills. Trail-specific. Taper. Each phase has its own purpose and its own honesty. Skip a phase and you skip a result.
Phase one: base, eight to ten weeks out
Build aerobic endurance on whatever terrain you can reach. Five days of running a week. One long, one moderate, the rest easy. If you live in a flat city, do not pretend you live in Himachal. But do work in the longest gradient you can find, even if that gradient is a flyover.
The base phase is not glamorous. It is the slow accumulation of capillaries, mitochondria, mental patience. It is also where most plans die, because runners want intensity and the body needs volume. Trust the boring work. I have written plans for runners who skipped this phase. They tend to come back the next year and write me an email about it.
Phase two: hills, six to four weeks out
Introduce hill repeats. Short ones first, 60 to 90 seconds at hard effort. Then longer climbs at threshold. If you can, replace one weekly easy run with a route that has 200 to 400 metres of cumulative climbing. Walking the steepest sections is not failure. The mountain rewards the steady walker over the broken runner.
The trail-specific block
The four weeks before the taper are where road training stops being enough. You need real trail. Real terrain, even if it is suboptimal. Find broken pavement, park trails, mud, gravel. Anything that breaks the rhythm of flat tarmac.
What trail running teaches the road runner
Cadence over stride length. Eyes a few metres ahead, not down at your feet. Power-hike the steep climbs without shame. Descend with arms loose and hips slightly forward. Drink small amounts often. Eat earlier than you would on the road, because the body burns fuel faster on uneven terrain.
I remember my first trail descent. I tried to run it like a road. Stride long, heels hitting, eyes on the watch. I went down twice in the first kilometre, the second time hard enough to take skin off a palm. After that fall, I walked. The mountain teaches the way only the mountain can, and it does not wait for you to be ready for the lesson.
Strength and the small things
Trail runners need strong ankles, calves, glutes, and core.
Two short strength sessions a week, twenty minutes each, is enough. Single-leg work matters more than two-leg work. Lateral movement matters more than forward push. If you can balance on one leg with your eyes closed for thirty seconds, you have most of what the terrain will ask of you.
For structure, look at the ultra-marathon training framework, even if you are running a shorter Bir route. Trail principles overlap with ultra principles. Both reward patience over pace. Both punish an unrehearsed stomach plan.
Fuelling on trail
Carry more than you think you need.
Trail aid stations are sparser than road events. Pack salt, sugar, real food. Bananas, dates, energy bars you have actually tested in training and not just bought the week before. A hydration vest is not a luxury at this distance and terrain. It is kit. The thirsty trail runner is the slow trail runner, every single time.
Race weekend
Arrive in Bir at least 48 hours before your race. Adjust to the altitude even though Bir is not extreme. Your sea-level lungs will still notice. Walk around the village, drink water, eat normally, sleep early. The first 24 hours can feel slightly off. By the second night, the body has settled.
Check your kit twice. Headlamp if your route starts pre-dawn. Layers for the cool morning, lighter clothing for the warmer climbs. Trail shoes you have already worn for at least three long runs. New shoes on race day is a kind of self-sabotage I cannot defend.
The morning of
Eat your usual pre-run breakfast. Porridge, eggs and toast, idli, whatever has worked before. Vaseline where you blister. Anti-chafe everywhere. Sunscreen even if the sky is still grey, because Bir mornings warm up faster than you expect once the sun clears the ridge.
Run the first hour by feel, not by pace. Use the STRIDD calculators beforehand to estimate a finish time. But on the trail, let the heart rate guide you. The runners I have seen blow up at Bir all share one trait. They tried to run road splits on a mountain route.
After the race
Walk. Eat. Sleep. Then drive down to the valley, eat momos, and let the experience settle for a few days before you decide what it meant. Trail races change runners in ways that are hard to articulate immediately.
For categories, registration, and the kit list, see the Bir Running Festival event page. Use the STRIDD plan generator to map your next mountain block, and browse the Running Lab for trail recovery and altitude pieces. The mountain will be there next October. The question is what you will bring to it.