Trail and ultra foot care: blisters, wet feet and first aid
On trails your feet get wet, sandy and hot for hours, and the descents push toes into the front of the shoe. Blisters are the most common reason for medical visits in multi-stage ultras. A small, well-chosen first-aid kit keeps you moving between aid stations.
Peak season in the US: April to October. · Updated
What foot care do trail and ultra runners need?
Trail and ultra runners need blister prevention for feet that stay wet and sandy for hours: moisture-wicking socks, shoes with toe room for descents, blister patches on known hotspots, dry socks at aid stations, and a small waterproof kit with patches and foam dressings.
Where it hurts: Trail & Ultra
- 2Chest — nipple guards
- 3Underarms — anti-chafe film
- 4Inner thighs — anti-chafe film
- 5Heels — blister patches
- 6Toes — blister patches
STAGE 1
Training block
Protect hotspots during long runs and hard sessions so you reach the start line with healthy skin.
STAGE 2
Race day
Apply before the start. Everything is designed to stay on to the finish.
Blister Patches
Hydrocolloid cushions for heels, toes and the ball of the foot.
Launching January 2027
Nipple Guards
Thin covers that reduce shirt friction on long runs.
Launching January 2027
Anti-Chafe Film
Thin film for inner thighs, underarms and seams.
Launching January 2027
Sport Nasal Strips
Spring-band strips that open the nasal passages.
Launching January 2027STAGE 3
After the finish
Cover broken skin, protect blisters and scrapes while they heal.
Tips
Trail & Ultra tips
- Change into dry socks at a drop bag or aid station when feet have been wet for hours.
- Clear grit from shoes early; sand and small stones turn into hotspots fast.
- Pack blister patches and foam dressings flat in a waterproof pouch in your vest.
- Trim toenails a few days before the race, not the night before.
Questions
How common are blisters in ultramarathons?
Very common. In one 219 km (136-mile) stage race, 76% of runners had blisters by day four, most of them on the toes. In a separate survey of French trail ultra runners, a history of blisters was a major risk factor for new ones.
What should be in my trail first-aid kit?
Blister patches, a few foam dressings for scrapes, an elastic bandage, and anything your race lists as required gear. Keep it small and waterproof.
Trail & Ultra guides
Feet
How to prevent blisters when running
How to prevent blisters when running: why they form, how common they are in marathons and ultras, and the steps with the best evidence, from socks to tape.
Feet
Hydrocolloid blister patches explained
What hydrocolloid is, how blister patches cushion and protect skin, when to use them before and after a blister forms, and how to make them stay on.
Recovery
Silicone scar sheets: how to use them
What international guidelines say about silicone gel sheeting for scars, when to start after road rash or surgery, how many hours to wear it and what results to expect.
Feet
Black toenails from running
Why runners get black toenails (runner's toe), how shoe fit, nail length and downhill running cause them, how to prevent them, and when a dark nail needs a doctor.
Feet
Should you pop a blister?
Should you pop a blister? When to leave it alone, when and how to drain it safely, aftercare and signs of infection, from dermatology and first-aid guidance.
Recovery
How to treat road rash
First aid for road rash after a bike crash, trail fall or obstacle race: cleaning, removing grit, keeping it moist and covered, tetanus timing and when to get medical care.
Buying guide
Best blister patches for running: how to choose
How to choose the best blister patches for running: material, edges, shape and size, how long they stay on, and which type to use before a run or on a blister.