Trail running in the rain is entirely doable, provided you gear up for the long haul. Out on the trail, water doesn't just fall from the sky: it flows, saturates the terrain, and drastically increases the risk of chilling on long runs. Properly equipped, you maintain pace and focus. Poorly equipped, you simply endure.
Trail running in the rain: key differences from road running
In trail running, rain alters terrain as much as comfort. Three major differences from road running.
- The ground turns slippery. Wet roots, rocks and mud reduce traction. Ease off on descents and read the trail ahead constantly.
- Longer self-sufficiency required. A trail run often lasts several hours far from any shelter. Moisture builds up over time and chills you rapidly during every stop.
- Pacing and effort shift. You alternate hard climbs with slower, technical descents. Your body heats up then cools quickly, requiring gear that protects without trapping heat.
The goal isn't to stay bone-dry at all costs, but to manage moisture so you never risk dangerous chilling.
Running in the rain: benefits, risks and safety
Running in the rain is safe in most conditions, and even advantageous, as long as you follow a few basic rules. On the plus side, the air is crisper and easier to breathe, the cooling effect prevents overheating, and braving the elements builds mental grit for race day.
The risks are real but easily managed. The primary hazard is hypothermia: wet and exposed to wind, your body sheds heat rapidly, especially when stationary. Second is slipping on slick trails. Third is poor visibility.
Three rules are all it takes: protect your core with a waterproof layer, ease off on technical sections, and stay visible. Change out of wet gear immediately after finishing to avoid a chill. In freezing conditions or forecast thunderstorms, postpone or shorten your run: no outing is worth hypothermia or a fall on exposed terrain.
How to gear up: head-to-toe kit
The rule is simple: moisture-wicking synthetic fabrics, a close fit, and an outer layer tailored to the rain's intensity. Ditch cotton, which traps water and weighs you down.
Upper body
Wear a technical synthetic t-shirt, short or long-sleeved depending on conditions. On top, the key piece is your outer layer: a water-repellent windbreaker for light drizzle, or a waterproof membrane jacket for sustained rain. A peaked hood keeps rain out of your eyes. Opt for a fitted cut to minimise chafing once wet.
The core piece: the waterproof jacket
On runs in steady rain, a waterproof jacket makes all the difference. It acts as the outer shell that stops water reaching your base layers while letting sweat vapour escape. Two key metrics define it: waterproof rating (in Schmerber) and breathability. We break these down in our guide to the best trail running jackets.
Key takeaway: aim for at least 20,000 Schmerber for a full day in the rain, paired with high breathability to prevent getting soaked from the inside on climbs. Waterproof overtrousers complete your protection on the most exposed routes.
Lower body
- Mild weather: lightweight, stretchy trail 2-in-1 shorts with an integrated liner and multi-pocket waistband to keep flasks and energy bars within easy reach.
- Cold conditions: synthetic running tights retain warmth and prevent chafing.
- In heavy downpours: add waterproof overtrousers on top. The STORM PRO PANT, built with 3-layer Ultrashell, seals out water across the wettest sections and packs away once the squall clears.
Explore the full range in our trail shorts and trousers collection.
When it comes to footwear, beware a common trap: waterproof shoes aren't always the best option in the rain. On wet runs, water doesn't just come from puddles: it runs down your legs and seeps in at the collar. Once inside, the membrane meant to block water also traps it: shoes stay waterlogged and dry slowly. For short showers, a membrane keeps feet dry; for long outings or torrential rain, non-membrane shoes that drain and dry fast are often far more comfortable. In all cases, grip on wet rock and mud comes first.
Accessories
- Peaked cap: keeps rain and sweat out of your eyes.
- Gloves: protect your extremities, the first to suffer from cold. Use waterproof over-mitts to keep hands completely dry.
- Headtorch and reflective details: visibility drops sharply in the rain, even during the day.
- Waterproof pouch or armband: keeps phone, keys and essentials protected.
One final habit makes all the difference: anticipation. Put on your outer layer before you get cold, not after. Once your core cools and clothing gets soaked through, warming up while running is tough. Likewise, protect extremities from the start on longer outings. It is far better to pack extra gear than run short and suffer.
The real challenge in the rain: accessing your vest, pockets and hydration flasks
Here is the crucial detail almost no one talks about: once your jacket is pulled over your trail vest, you lose easy access to flasks, food and pockets. You're left choosing between stopping to strip your jacket, or skimping on hydration and fuel. In a race, both cost you time and energy.
We engineered the STORM PRO + to solve this exact problem. The concept: wear it over your pack without restricting shoulder mobility or losing quick access to your gear.
- Side zips: allow direct access to soft flasks and pack contents while keeping your jacket fully zipped.
- Rear pleat: creates the necessary volume to fit cleanly over your pack.
- Deployable front gussets: free up space and eliminate chest compression.
The rest matches the same performance standard: 3-layer Ultrashell technology, 20,000 Schmerber waterproof rating, 80,000 g/m²/24h breathability, water-repellent YKK Aquaguard zips and a stiffened peak hood. Available in black for men and women.
FAQ
Is it good to run in the rain?
Yes, in most conditions. It builds mental endurance and provides vital preparation for wet race-day scenarios. That said, proper technical gear and heightened caution are essential.
Does running in the rain make you sick?
No, rain itself doesn't cause illness. The real risk is rapid chilling. Dress for the temperature and change into dry layers immediately after running to stay warm.
How should you dress for running in the rain?
A technical synthetic t-shirt, a waterproof jacket, a peaked cap and, if needed, waterproof overtrousers over tights.
Is exercising in the rain good for you?
Yes, provided you manage core temperature and stay safe. Cool air can even make sustained effort more comfortable. Just watch out for slick terrain and reduced visibility.
Should you walk or run in the rain to stay drier?
How wet you get mainly depends on how long you stay outside. Running cuts down exposure time. What matters most is protection: a quality outer shell changes everything, whatever your pace.
What shoes should you wear for trail running in the rain?
Not necessarily waterproof shoes. On long runs or in heavy rain, water enters around the ankle and the membrane prevents it from escaping: the shoe stays soaked and dries slowly. A shoe that drains quickly and dries fast is often more comfortable. Prioritise wet-surface grip above all.
How do you stay hydrated and access your pack in the rain?
Choose a jacket designed to fit over your running vest, equipped with dedicated access points. The STORM PRO + features side zips that let you reach flasks and pack pockets without taking the jacket off.
Photo credits: Delphine Daniélou (header image)
