How to Crew an Ultra Without Getting Fired

How to Crew an Ultra Without Getting Fired

Your runner did not pick you because you love running. They picked you because you own a cooler, you can read a spreadsheet, and you do not panic. Crewing a 100-miler is a logistics job with a heart-rate monitor attached to it. Do it well and you are invisible: bottles full, socks dry, cutoffs met. Do it badly and you are the reason a fourteen-month training block ends in a camp chair at mile 62.

Here is the whole job, from the crew chair.

Crewing Is Not Cheerleading

Crew are the people allowed to meet a runner at designated aid stations to hand off supplies, swap gear, patch problems, and push them back onto the course before the cutoff clock runs out. That is the entire mandate. You are a pit stop with opinions.

A pacer is different — a pacer runs with the athlete for a leg, usually after mile 50 or through the night. One person can do both jobs across a race, but they are not the same job, and most races only let pacers on course past a certain station. Read the rules before you assume you can do either.

The math that should scare you: at a mountain 100, your runner will pass through crew-accessible stations maybe five to eight times over 20-plus hours. Each stop is ninety seconds to five minutes. You will spend the other nineteen hours driving, waiting, and being cold. The race is mostly yours to lose in those ninety-second windows.

Before Race Day: The Homework

Read the crew guide twice. Every race publishes one. It tells you which aid stations allow crew (never all of them), where you can park, which roads close and when, and the cutoff times at each station. Highlight the crew stations. Ignore the rest — you cannot go there, and trying is how runners get disqualified.

Build a drive-time sheet. Mountain aid stations are connected by dirt roads that take 40 minutes to cover 9 map-miles. Your runner might travel 8 trail miles faster than you drive 20 road miles to the next meeting point. Miss them once and they run a 15-mile leg with an empty flask. Write out: station name, mile, your ETA, their projected ETA at goal pace and at slowed pace. Pad everything.

Pack the crew box the night before. Not race morning. Race morning you will forget the headlamps.

The Crew Box

One clear tote, packed so you can find anything in the dark without unpacking it:

• Fluids and fuel: their drink mix pre-portioned into labeled bags, backup gels, real food (boiled potatoes, salt, quartered PB&Js, ginger chews, flat cola in a bottle). Bring twice what the plan says.
• Feet: two spare pairs of socks, a fresh pair of shoes a half-size up for swollen feet, anti-chafe salve, blister kit, scissors.
• Warmth for the night: a puffy, a beanie, gloves, a dry shirt. The temperature at a 9,000-foot aid station at 2 a.m. is not the temperature at the noon start.
• Light: a bright headlamp and spare batteries — yours, for setting up in the dark, and a backup for them.
• Admin: camp chairs, a headlamp for you, trash bags, hand wipes, cash, a printed cutoff sheet, and a battery bank.

A dedicated night headlamp is the one item crews most often cheap out on and most regret at 3 a.m. Something in the 400-600 lumen range with a real rechargeable cell is the floor for aid-station work and handing a runner into the dark. If you are buying one item for the box, see what a proper night lamp costs.

Keep a jar of anti-chafe salve in the feet kit and a second one in your pocket — a runner who is chafing raw at mile 70 will not think to ask, and a cult anti-chafe salve applied by you at mile 46 prevents the mile-70 crisis.

At the Station: The 90-Second Handoff

Park where the guide says, then hike in — crew lots are often a half-mile from the actual tent. Set up on the exit side of the aid station so your runner moves toward the course, not back the way they came.

Have everything laid out before they arrive: full bottles standing up, food open, chair ready but not encouraged. When they come in, you work and they eat:

1. Take their bottles or flasks, hand them the pre-filled replacements. Do not stand there mixing drink powder while the clock runs.
2. Ask two questions: "How are your feet?" and "How's your stomach?" Those two systems end more races than the legs do.
3. Fix the one thing. Reapply salve, swap socks, add a layer, refill fuel. One problem per stop unless it is an emergency.
4. Restate the plan: "Next crew is Silverpine, mile 38, you're 40 minutes under cutoff, eat before the climb." Then walk them out. Literally walk beside them to the exit.

Pre-mixing their fuel is the single biggest time-saver you own. If they run on a powdered endurance mix, have every bottle for the next leg made up and capped before they arrive; a tub of drink mix portioned into labeled bags turns a four-minute stop into ninety seconds. Minutes banked at the table are minutes off the finish — the same math their aid-station strategy runs on.

The Runner at Mile 70 Is Not Your Runner

Somewhere after dark, the person you drove up with disappears and is replaced by someone slower, quieter, and occasionally mean. This is normal. Do not take the tone personally and do not match it. Your job is three things, in order: calories, feet, forward.

Feed them something even if they say no. Look at their feet even if they say they are fine. Get them moving even when the chair is winning — because the chair always wins if you let it. A runner who sits for twenty minutes at mile 78 rarely gets up faster; they get up colder and stiffer. Kindness at 3 a.m. sometimes looks like handing someone their poles and pointing at the trail.

How to Actually Get Fired

• Muling. Carrying their pack, walking their supplies up the trail to them, or handing off anything outside the marked crew zone. This is aid outside the rules, and it gets runners disqualified. Stay in the box.
• Missing them. The unforgivable one. Leave early, arrive early, wait long.
• Lying badly. "You look great" at mile 80 fools no one. "You're moving well and you're under cutoff, eat this" is honest and useful.
• Panicking. If their stomach is wrecked or a foot looks bad, you are the calm one. Panic is contagious and it ends days.

Crewing well is a gift, which is why finishers hand crew and pacers a thank-you afterward — it is one of the few rituals in the sport where the support gets commemorated, not just the runner. If you want to see the whole day from the athlete's side of the table, walk through a 100K narrated aid station by aid station, and if you are assembling a box from scratch, our gear picks cover the lamp, salve, and fuel that live in every good crew tote.