Westweg Ultra-Trail: Conquering Rain and Cold for Peak Performance

Westweg landscape in the rain, difficult trail running weather conditions

Westweg: Performing in Ultra-Trail When Everything is Against You

The Westweg, with its hostile weather, is an unforgiving challenge. Driving rain, biting cold, pervasive dampness, and wavering morale. Yet, it's precisely this type of outing that teaches the most about ultra-trail performance.

In these conditions, performance becomes a matter of system, not just speed. Here’s what we learned on the field.

Equipment and strategy for the Westweg in difficult conditions

3 Essential Takeaways

1. Managing Dryness = Managing Your Performance

In terrible weather, when you're wet, you quickly lose control: body temperature, comfort, clarity of mind... then pace, then decision-making ability.

The best lever validated on the Westweg:

  • Change regularly: t-shirt and socks (sometimes even pants)
  • If possible, alternate shoes at aid stations or with crew (one “running” pair, one “dry” pair)
  • Use every stop point to perform a micro “reset”

In a long ultra, you don't just endure the weather: you actively organize moments to get dry.

2. Aid Stations: Solid, Simple, Effective

When it's cold and damp, “easy” energy becomes an obsession. Without a solid foundation, everything becomes unstable: mood, pace, digestive tolerance.

At aid stations, prioritize:

  • Solid food (not just sugary liquids)
  • Warm food if possible
  • Salty food (when the stomach allows)
  • And most importantly: eat before you’re hungry

Aid stations are a structural pillar of your strategy.

3. The Tortoise Wins: Don't Rush

In the rain, the classic mistake is to run too fast “to get it over with.” This works for 30 minutes... then the consequences hit abruptly.

The good model is simple:

  • Humble start
  • Sustainable pace
  • Calm decisions
  • Progress in blocks

In difficult conditions, performance is the ability to remain “calm” for a long time.

Runner on the Westweg coping with difficult weather conditions Aid station and crew support on the Westweg

Scientific Insight: What the Literature Shows

The Impact of Cold and Humidity on Performance

In cold, rainy, and windy conditions, your body expends more energy to:

  • Maintain its core body temperature
  • Manage neuromuscular fatigue (tension, muscle stiffness)
  • Preserve cognitive functions (attention, decision-making)

Result: you can feel “drained” without realizing it... until everything suddenly deteriorates.

What protects you most:

  • Staying as dry as possible (planned changes)
  • Eating regularly (small, frequent intakes)
  • Maintaining a controlled effort level to avoid the spiral of “burnt out + frozen + declining lucidity”

When the weather is awful, you must optimize your system. Your legs will follow.

Reference: Human physiological responses to cold exposure: Acute responses and acclimatization to prolonged exposure by Castellani JW, Young AJ. (2016).

Trail runner facing the elements on the Westweg

In Practice: The Westweg Checklist (Difficult Weather)

  • Plan for changes (t-shirt/socks) before you're in trouble
  • If possible: 2 pairs of shoes + a “dry spare pair”
  • Aid stations = solid + simple + salty if the stomach accepts
  • During the effort: regularity (mental timer: “I eat / I drink” every X minutes)
  • “Tortoise” strategy: never run to “escape” the weather
  • Mental: stay positive and thank your crew (they are your anchor and your source of moral warmth)

What We Learned

✔️ Staying dry saves time (and prevents mistakes).
✔️ Solid food at aid stations, regular intake on the trail.
✔️ The tortoise wins when conditions turn hostile.
✔️ Gratitude + positivity: it's a performance strategy.

— Antoine, Baptiste and Etienne from TRL