DOWNHILL SHEAR10,050 FT OF LOSS
Japan · May · 71 mi
Foot care for Aso Volcano Trail
Aso Volcano Trail is a descent race. Toes and nail beds pay first.
Threat matrix
What Aso Volcano Trail does to feet.
Every line below is computed from published course data or written by PR Run and labeled as such.
- Downhill shearMile 66 to 69.5 drops 1,850 ft at 10 percent average grade. Toes hit the front of the shoe, heels lift.Course data
- Heat and sweatMay highs reach 85 degrees F. Sweat saturates socks, skin softens, friction climbs.Course data
- Hours on feet71 miles inside a 28 hour limit. Every hour adds shear, swelling, and sock saturation.Course data
- Long aid gaps14.2 miles between stations at the widest gap. Carry what you need to fix a hot spot alone.Course data
- Night hoursA 28 hour window means hours of taping in the dark with cold hands. Practice it that way.Course data
Downhill shear
Where gravity works on your toes.
Sustained descents pulled straight from the elevation profile. Pretape before these, not after.
Heat and moisture
When the shoe stops drying out.
Modeled across the cutoff window from 7 years of race-date weather at points along the course.
- HEATSweat outruns the shoe
- HUMIDNothing dries out
- WETPlan on soaked feet
- COLDNumb toes hide damage
The schedule
Where you sit down and take the shoes off.
Set your goal time. The clocks, the stop plan, and the kit all move together.
- JapanMI 006:00
Eyes only
Named station on course.
- Eyes only. Feel for hot spots through the sock and keep moving.
- Aso Volcano Trail mile 14MI 1410:36
Shoes off
14.2 mi since the last stop, 1,650 ft of descent into it, cutoff 5.6000000000000005 h.
- Shoes and socks off. Pat completely dry, fresh socks, powder if the last pair was soaked.
- Check toes and nail beds. 1,650 ft of descent came into this stop.
- Aso Volcano Trail mile 28MI 2815:12
Socks and a look
14.2 mi since the last stop, cutoff 11.200000000000001 h.
- Socks off. Check the pressure points and swap if the pair is wet.
- Aso Volcano Trail mile 43MI 4319:48
Eyes only
14.2 mi since the last stop, cutoff 16.8 h, late race, feet already soft.
- Eyes only. Feel for hot spots through the sock and keep moving.
- Aso Volcano Trail mile 57MI 5700:24
Socks and a look
14.2 mi since the last stop, 200 ft of descent into it, cutoff 22.400000000000002 h, late race, feet already soft.
- Socks off. Check the pressure points and swap if the pair is wet.
- Finish JapanMI 7105:00
Shoes off
14.2 mi since the last stop, 3,450 ft of descent into it, cutoff 28 h, late race, feet already soft.
- Shoes and socks off. Pat completely dry, fresh socks, powder if the last pair was soaked.
- Check toes and nail beds. 3,450 ft of descent came into this stop.
Checked on top of the essentials for Aso Volcano Trail.
Vest / pack
Crew bag
Drop bag
Kit deltas
What Aso Volcano Trail adds to the standard kit.
- Powder and a moisture barrierSweat is the friction multiplier on this course.
- Pretape for toes and heelsLong descents load the front of the shoe and lift the heel.
- Vest foot kit you can use aloneThe widest gap is long enough that a hot spot becomes a blister before the next station.
- Light you can tape byTaping in the dark with cold hands is a different skill than taping at your kitchen table.
Shoes
What survives this course.
Matched on terrain, technicality, and distance. Fit still beats every spec, so try them on a long run first.
- Craft Nordlite Ultra Pro81% MATCH32mm heel · 6mm drop · 4mm lugs. Cushion that keeps feeling like cushion at hour twenty.
- adidas Fluidflow 2081% MATCH26.4mm heel · 8.1mm drop. Weighs 316g without giving up stack.
- adidas Pureboost 2381% MATCH27.6mm heel · 11.5mm drop. Weighs 305g without giving up stack.
Crew
What your crew needs on paper.
Two plates. On the left, the race-specific notes that never make it into the standard script. On the right, the printable card your crew reads at two in the morning under a headlamp.
Race day notes
- Crux near Humid climbs, ridge exposure, and aid gaps in remote terrain near mile 46. Plan foot work before the field splits.
- Surfaces: 75% trail / 20% dirt road / 5% paved. Match lugs and tape adhesion to the dominant surface.
- Air band 50°F to 85°F. Crew should carry dry socks and skin lube when heat or rain is in range.
- Cutoff 28 hours. Longer stops only where the schedule has real buffer.
- Educational only. Test every tape, sock, and shoe combination on long runs before race day.
Where you sit down
- Aso Volcano Trail mile 14MI 14
- Finish JapanMI 71
Print card
A single sheet your crew reads at two in the morning: the stop script, the mandatory kit, and the calls that pull the runner. Print it, laminate it, staple it to the drop bag.
Crew foot care card
Station script. Three to eight minutes if organized.
- Runner sits. Shoes and socks off both feet.
- Inspect: hot spots, maceration, nails, blisters.
- Clean with wipe. Pat completely dry. No tape on damp skin.
- Treat hot spots first. Drain blisters only if necessary with clean technique.
- Fresh socks. Relace shoes. Runner stands and tests before leaving.
Mandatory kit
- Leukotape, kinesiology tape, wipes, blister patches, moleskin
- Scissors, nail clippers, lubricant, powder, spare socks (2+)
- Antibiotic ointment, gloves, cohesive wrap, small towel
When to pull runner: spreading redness, loss of feeling, gait collapse, unmanageable pain.
PR Run · pr.run/foot-care
FAQ
Aso Volcano Trail foot questions.
- 01
Where should I stop for foot care at Aso Volcano Trail?
Aso Volcano Trail mile 14 at mile 14.2, Finish Japan at mile 71. Those stops carry the most ground and descent behind them, so a sock change and a tape check pay for the minutes they cost.
- 02
Which section of Aso Volcano Trail wrecks feet?
Mile 66 to 69.5 drops 1,850 ft at 10 percent average grade. That is where toes meet the front of the shoe and heels start to lift. Pretape before it, not after.
- 03
How do I keep my feet dry at Aso Volcano Trail?
May highs reach 85 degrees F. Sweat saturates socks, skin softens, friction climbs. Change socks at every stop you can, run powder or a moisture barrier, and lean forward when you dump water on your head so it misses your shoes.
- 04
How many sock changes for Aso Volcano Trail?
Plan one at every foot stop you have access to, and carry one spare pair beyond that. 71 miles inside 28 hours is long enough that dry socks are faster than the five minutes they cost.
- 05
What goes in my vest for Aso Volcano Trail?
14.2 miles between stations at the widest gap. Carry what you need to fix a hot spot alone. Tape, two wipes, a blister patch, and a small tube of lube covers a hot spot without waiting for crew.
- 06
How do I stop blisters at Aso Volcano Trail?
Start from the biggest threat on this course. Mile 66 to 69.5 drops 1,850 ft at 10 percent average grade. Toes hit the front of the shoe, heels lift. Fit the shoe with room for swelling, pretape the spots that have blistered on you before, keep grit out, and change socks at every stop you have access to. Blisters come from pressure, friction, and moisture, so remove whichever one this course hands you the most of.
- 07
What foot care kit should I pack for Aso Volcano Trail?
Beyond the standard kit, this course calls for powder and a moisture barrier, pretape for toes and heels, vest foot kit you can use alone, light you can tape by. Sweat is the friction multiplier on this course.
- 08
What shoes work for Aso Volcano Trail?
75% trail / 20% dirt road / 5% paved at technicality 5/10 points toward Craft Nordlite Ultra Pro, adidas Fluidflow 20, adidas Pureboost 23. Whatever you pick, race it on a long run first and leave room for feet that swell over the back half.
Educational only. Not medical advice. Persistent pain, infection, or numbness: see a podiatrist or sports medicine clinician.
Train for it
Feet get you to the finish. The plan gets you there on the clock.
Foot care is one system on Aso Volcano Trail. Climbs, descents, heat, fueling, and cutoffs are the rest of it.