DOWNHILL SHEAR21,200 FT OF LOSS
California · October · 200 mi
Foot care for Mammoth 200
Mammoth 200 is high, cold at night, and long.
Threat matrix
What Mammoth 200 does to feet.
Every line below is computed from published course data or written by PR Run and labeled as such.
- Cold nights and swollen feetAfternoon sweat, then freezing nights at altitude, across two hundred miles. Dry socks before dark and a larger pair of shoes staged late.PR Run field call
- Hours on feet200 miles inside a 100 hour limit. Every hour adds shear, swelling, and sock saturation.Course data
- Total descent load21,200 ft of cumulative descent. Nail beds and forefoot pay for all of it.Course data
- Downhill shearMile 194 to 200 drops 2,550 ft at 8 percent average grade. Toes hit the front of the shoe, heels lift.Course data
- Heat and sweatOctober highs reach 85 degrees F. Sweat saturates socks, skin softens, friction climbs.Course data
- Cold and numb toesLows near 20 degrees F. Wet feet plus cold is how trench foot and numb toes start.Course data
- Technical groundTechnicality 8/10. Rock strikes, side loading, and constant foot correction grind the same spots.Course data
- Long aid gaps20 miles between stations at the widest gap. Carry what you need to fix a hot spot alone.Course data
- Night hoursA 100 hour window means hours of taping in the dark with cold hands. Practice it that way.Course data
- Altitude swellingHigh point near 10,994 ft. Feet swell at altitude, so shoes that fit at the start pinch by dark.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.
- CP1MI 2014:12
Socks and a look
20 mi since the last stop, cutoff 10 h.
- Socks off. Check the pressure points and swap if the pair is wet.
- CP2MI 4022:24
Socks and a look
20 mi since the last stop, cutoff 20 h.
- Socks off. Check the pressure points and swap if the pair is wet.
- CP3MI 6006:36
Eyes only
20 mi since the last stop, cutoff 30 h.
- Eyes only. Feel for hot spots through the sock and keep moving.
- CP4MI 8014:47
Shoes off
20 mi since the last stop, 1,200 ft of descent into it, cutoff 40 h.
- Shoes and socks off. Pat completely dry, fresh socks, powder if the last pair was soaked.
- Warm the feet before tape. Cold damp skin will not hold adhesive.
- Pretape hot spots. 1,950 ft down through mile 97 to 117 is next.
- CP5MI 10022:59
Socks and a look
20 mi since the last stop, 1,050 ft of descent into it, cutoff 50 h.
- Socks off. Check the pressure points and swap if the pair is wet.
- CP6MI 12007:11
Shoes off
20 mi since the last stop, 1,650 ft of descent into it, cutoff 60 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. 1,650 ft of descent came into this stop.
- CP7MI 14015:24
Eyes only
20 mi since the last stop, cutoff 70 h, late race, feet already soft.
- Eyes only. Feel for hot spots through the sock and keep moving.
- CP8MI 16023:36
Eyes only
20 mi since the last stop, cutoff 80 h, late race, feet already soft.
- Eyes only. Feel for hot spots through the sock and keep moving.
- CP9MI 18007:48
Eyes only
20 mi since the last stop, cutoff 90 h, late race, feet already soft.
- Eyes only. Feel for hot spots through the sock and keep moving.
- FinishMI 20016:00
Shoes off
20 mi since the last stop, 2,550 ft of descent into it, cutoff 100 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. 2,550 ft of descent came into this stop.
Checked on top of the essentials for Mammoth 200.
Vest / pack
Crew bag
Drop bag
Kit deltas
What Mammoth 200 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.
- Extra dry socks and a towelCold wet feet break down faster than cold dry feet.
- 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.
- Half size up in the crew bagFeet swell over the back half. A tight shoe at midnight ends races.
- Moleskin for pressure pointsRock strikes and side loading build hot spots off the usual map.
Shoes
What survives this course.
Matched on terrain, technicality, and distance. Fit still beats every spec, so try them on a long run first.
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
- October at eleven thousand feet means real cold once the sun drops, on feet that sweated all afternoon.
- Two hundred miles with big altitude keeps feet swollen the entire back half.
- Educational only. Test every tape, sock, and shoe combination on long runs before race day.
Where you sit down
- CP4MI 80
- CP6MI 120
- FinishMI 200
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
Mammoth 200 foot questions.
- 01
Where should I stop for foot care at Mammoth 200?
CP4 at mile 80, CP6 at mile 120, Finish at mile 200. 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 Mammoth 200 wrecks feet?
Mile 194 to 200 drops 2,550 ft at 8 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 Mammoth 200?
October 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
Do I need dry socks for the cold sections of Mammoth 200?
Lows near 20 degrees F. Wet feet plus cold is how trench foot and numb toes start. Put a dry pair in every bag you will see after dark and warm your feet before you tape.
- 05
How many sock changes for Mammoth 200?
Plan one at every foot stop you have access to, and carry one spare pair beyond that. 200 miles inside 100 hours is long enough that dry socks are faster than the five minutes they cost.
- 06
What goes in my vest for Mammoth 200?
20 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.
- 07
How do I stop blisters at Mammoth 200?
Start from the biggest threat on this course. 200 miles inside a 100 hour limit. Every hour adds shear, swelling, and sock saturation. 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.
- 08
What foot care kit should I pack for Mammoth 200?
Beyond the standard kit, this course calls for powder and a moisture barrier, pretape for toes and heels, extra dry socks and a towel, vest foot kit you can use alone, light you can tape by, half size up in the crew bag, moleskin for pressure points. Sweat is the friction multiplier on this course.
- 09
What shoes work for Mammoth 200?
65% trail / 28% jeep / 7% paved at technicality 8/10 points toward Nike Zegama Trail, Brooks Cascadia 19, Brooks Cascadia 19. 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 Mammoth 200. Climbs, descents, heat, fueling, and cutoffs are the rest of it.