Weather conditions in trail running can be changeable. Out in nature, especially in the mountains, rain is not uncommon. To run in optimal conditions and stay safe, it is essential to choose the right rain gear for trail running.
Key takeaways:
- The right kit ensures comfort, safety and performance in trail running.
- Waterproofness, breathability, lightness and compressibility are the key criteria to consider.
- Base layers must be suited to wet conditions.
- Some accessories effectively complement your kit in wet weather.
The importance of the right kit for the rain
Choosing the right trail clothing for the rain is not just a matter of comfort, but also of safety. In bad weather, visibility is reduced, the terrain becomes slippery and the risk of hypothermia is real.
Getting wet lowers your core temperature and your body burns more energy to warm itself back up. This drop in energy then has an impact on motivation. It is therefore essential to wear kit that maintains thermal comfort, blocks rain and allows sweat to escape.
Running a trail involves constant movement. Wet clothing, however, tends to cause chafing. To prevent injuries, wear a well-fitted kit designed for the purpose to minimise risk.
Finally, race conditions become more technical in the rain. Rocks are slippery, the terrain is muddy and visibility is reduced. The right kit allows you to stay focused and reactive, minimising falls and navigation errors.
Criteria for choosing your rain gear for trail running
Several factors should be considered when choosing rain gear for trail running. Waterproofness is the most important, as it protects against rain, prevents body cooling from moisture and allows you to face unpredictable weather conditions. It is measured in mm water column (Schmerber). For running in the rain, we recommend choosing trail jackets with a minimum waterproofness of 10,000 mm.
Breathability allows sweat to escape, helps regulate body temperature and maintains a level of comfort in motion. Breathable fabrics prevent the feeling of sticky, damp clothing during a trail run. Breathability is expressed in RET (resistance to evaporation of sweat) or MVTR (moisture vapour transfer rate). For trail running, we suggest prioritising garments with a RET below 6 or an MVTR of at least 10,000 g/m²/24h.
In trail running, every gram counts and lightness should be a priority. Lightweight kit is more comfortable, easier to carry and causes less chafing due to the frequent absence of seams.
Just like lightness, compressibility is a strategic advantage during a race. When every centimetre counts, compressible garments fold in on themselves or slip into a pocket. They are therefore quickly accessible in the event of sudden rain.
Essential base layers for wet weather
Trail jackets are an essential in wet weather. They must be waterproof, breathable and lightweight (around 150 to 200 grams). For better protection, opt for a model with a hood with a peak. As well as shielding your face from gusts and rain, it improves visibility and comfort.
Several options are available for the lower body. Waterproof trail trousers are ideal in prolonged rain. Waterproof overtrousers, worn over tights or shorts, are a good alternative when the weather is uncertain. Finally, a water-repellent, windproof legging can also be enough against light rain.
Technical base layers play a role in managing temperature and moisture. For this reason, cotton should be avoided, unlike synthetic materials or merino wool. To prevent irritation, opt for a close-fitting cut that dries quickly.
To choose the right trail socks, breathability is essential for efficient moisture management. Socks can be made from merino wool to keep your feet warm, even when wet. Some brands also offer waterproof pairs for extra protection.
Finally, accessories such as a cap, a buff or lightweight water-repellent or waterproof gloves are very useful in the rain. Also think about choosing an effective trail headlamp and wearing reflective elements to stay visible.
Choosing the right rain gear for trail running is not that complicated, as long as you take certain criteria into account. It is also worth checking that your kit meets the requirements of specific trail races such as the UTMB. That way, you can run with complete peace of mind.
Photo credits: Delphine Danielou
