What is Crewing an Ultra Marathon?
Crewing an ultra marathon means supporting a runner through a race longer than a marathon — often 50K, 50 miles, 100K, or 100 miles. As a crew member, you'll meet your runner at designated aid stations along the course, providing food, gear, encouragement, and anything else they need to keep moving forward.
It sounds simple, but in practice crewing is a demanding, often sleep-deprived, logistics-heavy job that directly influences whether your runner finishes. The best crews are proactive, organized, and emotionally steady — even when everything is going sideways at 3 AM.
Your Role as a Crew Member
Your primary job is to make every aid station visit fast, efficient, and positive. Runners spend more energy than they realize at aid stations — the longer they linger, the harder it is to keep moving. A well-prepared crew can get a runner in and out in two or three minutes, fully restocked and mentally reset.
Beyond logistics, you're also your runner's connection to the outside world. Deep into a hundred-miler, runners lose perspective. They may be convinced they can't continue when the reality is they just need calories and a fresh pair of socks. Your job is to be the steady voice that helps them make good decisions.
- Track your runner's estimated arrival at each aid station
- Have their gear and nutrition ready before they arrive
- Quickly assess their physical and mental condition
- Get them back on course efficiently
- Keep morale high — yours and theirs
Before Race Day: Planning and Preparation
Most crewing disasters are planning failures. Build your race plan before the event, not during it.
Study the course map and the aid station guide. Know exactly which aid stations allow crew access — most ultras restrict crew to specific locations. Mark them on a map, along with the mileage and estimated time windows for your runner.
Create a pacing chart. If your runner has a goal time or knows their expected pace for different parts of the course, use that to build arrival windows for each crew-accessible aid station. Build in buffer — runners almost always slow in the second half, especially in 100-milers.
Prepare drop bags for aid stations where crew isn't allowed. Drop bags are small bags left at specific stations by race staff. Think of them as remote crew support — pack them with familiar nutrition, a change of socks, and any gear your runner might need for that portion of the course.
Pack your crew vehicle the night before. Organized bins or totes by category — nutrition, gear, medical — make aid station stops faster and less stressful.
Understanding the Course and Aid Stations
Aid stations in ultras are not all created equal. Some are fully stocked with soup, broth, and medical staff. Others are water only. Know which is which so you're not caught short expecting the race to provide what you need to bring yourself.
Understand cutoff times — the time limits at specific aid stations beyond which a runner will be removed from the race. Know your runner's pace relative to these cutoffs. If they're falling behind, that's a conversation you may need to have calmly and early.
Race Day: Running Your Aid Station
Arrive at each aid station well before your runner. Leave extra time — getting lost, parking issues, and slow traffic are common. Being late means your runner arrives and you're not there, which is one of the worst experiences in the sport for both of you.
Set up before they arrive. Have their nutrition out, their pack topped off, and their change of clothes accessible. Know what they said they'd want at each station.
When Your Runner Arrives
- Greet them positively regardless of how they look
- Ask what they need — don't assume
- Fill bottles and bladders immediately
- Offer food options without overwhelming them with choices
- Check for visible issues: blisters, chafing, swelling
- Keep the clock in mind — don't let them sit too long
Supporting Your Runner Mentally
The mental side of ultra crewing is underrated. At some point in any long race, your runner will hit a low. They may be emotional, say they want to quit, or seem like a different person from the one who started at 5 AM.
This is normal. Your job is not to panic and not to dismiss it. Acknowledge how hard it is, address the physical needs first, and gently redirect toward moving forward. "Let's just get to the next aid station" is often exactly the right thing to say.
Know the difference between a runner wanting to quit because they're suffering — which is expected — and a runner who needs to stop because something is medically wrong. Learn the warning signs before race day.
Common Crewing Mistakes to Avoid
- Arriving late to aid stations
- Not knowing where to park or where crew is allowed
- Overwhelming your runner with questions and decisions when they arrive
- Letting them sit too long when they should be moving
- Forgetting to eat, drink, or sleep yourself
- Showing worry or negativity — your runner reads your face
UltraCrew helps you stay organized across every aid station — from pre-race planning to real-time condition tracking on race day. Sign up free and bring the whole crew.
Making the Most of the Experience
Crewing is one of the most unique experiences in endurance sports. You'll cover a lot of miles yourself, navigating mountain roads at 2 AM and waiting in the dark at remote trail crossings. You'll see your runner through their lowest moments and their highest highs.
When they cross the finish line, you'll feel it too. Come prepared, stay positive, and trust your runner. They chose you for a reason.