The Short Answer
Distance alone does not determine whether a crew is necessary. At a 100-mile race, a 24-hour race, or a backyard ultra past the first night, a crew can help with supplies, observation and rest logistics. Always confirm what the race allows: some events restrict crew to specific points, some ban outside assistance, and self-supported stages commonly prohibit personal outside assistance.
Crew Importance by Format
| Format | Crew needed? | Why |
|---|---|---|
| 50K / 50 miles | Usually no | Aid stations and one drop bag usually cover a daylight race; check the aid spacing |
| 100K | No, but useful | Helpful for a light and layer change if you finish after dark |
| 100 miles | Yes, if allowed | Night section, shoe changes, and decision fatigue; a pacer for the second half if permitted |
| 24-hour race | Recommended | Short loop means a crew can prepare food and layers every lap and cut stopped time |
| Backyard ultra | Recommended past about 24 yards | With 5 to 15 minutes per hour, a crew hands you what you need so you can sit; confirm camp and crew access |
| 6-day race | Yes, or a rehearsed solo system | A week of meals, laundry, sleep wake-ups, and foot care |
| Self-supported stage race | Usually restricted or prohibited | Check exactly what you carry and what water, shelter and assistance the organizer supplies |
What a Good Crew Actually Does
A crew reduces practical work and supports your decisions. Late in an ultra, simple tasks become expensive: opening bags, finding dry socks, remembering how much you ate, or deciding whether to add a jacket before the temperature drops. A good crew turns those choices into a repeatable system, which can reduce avoidable delays without rushing necessary care.
- Offers familiar food and drink; tracks any caffeine already taken before offering more
- Records intake, bathroom stops, and unusual behavior so you do not have to remember
- Handles foot care access, sock swaps, backup shoes, and layer changes
- Keeps stops short while allowing rest or assessment when you need it
- Watches for medical red flags and sends you to race medical staff rather than diagnosing
Give your crew a written plan: what you want at each stop, what to do if you cannot tolerate food, and which symptoms need medical help. Your current consent overrides the pre-race plan. Our crew instructions guide has a template.
Racing Solo Successfully
Solo racing works when you remove decisions before the start. Pack by time block rather than by product type: early race, night, cold weather, foot care, emergency food. Put written instructions in each bag so you do not have to remember the plan when you are tired. Confirm what the aid stations actually stock, and set flexible reminders for eating, drinking, and foot checks rather than trusting your judgment at 3 a.m.
If the race allows drop bags, keep them boring and obvious. Use large labels, transparent bags, and duplicates of the items that end races: socks, lubricant, batteries, and familiar food. Check both completeness and access: a packed item is useful only if you can find it when needed.
Sources
- International Association of Ultrarunners — 24-hour discipline overview
- International Association of Ultrarunners — competition and technical documents; the rules for the specific event remain controlling
- Big's Backyard Ultra — official backyard ultra rules, including the ban on personal aid during a yard; local camp and crew arrangements need a separate check