Team-based endurance racing is gaining real traction across the running world. Runners want more than a solo finish line from a team relay race. They want shared strategy, shared stakes, and a result that reflects real teamwork. The Infinite Running League, or IRL, builds its entire model around that idea. This guide covers the format, the team structure, the divisions, and how to join a running league built for team runners.
What Is the Infinite Running League?
IRL is a relay running league built on team competition. Each team includes three subteams, made up of an all-male squad, an all-female squad, and a co-ed squad. Every subteam carries 10 runners, which brings total team size to 30 runners.
The league runs two races per year, giving teams a full season built around two high-stakes events rather than a packed race calendar.
IRL organizes competition into professional and amateur tiers, and it welcomes a wide range of participants. High school teams are eligible to compete, alongside adult club and independent teams. This structure gives IRL a season-long, sports-league feel rather than a single event.
IRL is continuing to build its racing community and infrastructure, with a dedicated platform in development for runners and team managers. The platform will bring registration, team management, race data, and other key league information together in one place, making it easier for teams to manage their IRL journey from preparation through competition.
How Does a Relay Race Work?
Each 10-runner subteam splits into two vans of five. Athletes rotate through their legs in a fixed order, and every runner completes three legs across the race. Total distance lands around 200 miles per subteam, spread across mixed terrain and varying difficulty.
Races begin in staggered waves. Slower teams start first, and faster teams follow later. This keeps the field close and competitive from start to finish.
How Are IRL Teams Structured?
A full IRL team has 30 runners, divided into 3 subteams: male, female and co-ed. Each subteam is a racing unit unto itself, with 10 runners distributed between two vans and three legs each.
Coordination is key at both levels. Team managers are responsible for the logistics and strategy for all three sub-teams, while each sub-team manages its own pace, rotation and van preparation on race day.
The IRL League Divisions
IRL organizes teams into three groups.
- Group A: professional teams
- Group B: professional teams
- Group C: amateur teams, open to any group that wants to compete, including high school teams
This structure gives new teams a clear entry point. The split between amateur vs professional relay racing keeps competition fair while still giving new teams a path upward.
How Do Promotion and Relegation Work?
Standings shift after every race cycle. The bottom three teams in Groups A, B, and C drop down a tier. The top three teams from the lower groups move up to replace them.
Every race carries weight under this system. A single strong result can move a team closer to professional status, and a weak result can send a team back down. This keeps competition intense throughout the season.
Competition Categories
Teams also compete within one of three categories, based on runner composition.
- Female Division: every runner on the team is female
- Co-ed Division: at least five female runners per team
- Male Division: any team that does not meet the female or co-ed requirement
This system gives runners a category built around comparable, fair competition.
How Is IRL Different From a Traditional Relay Race?
Most relay races, including a standard marathon relay, run as single, standalone events. Teams show up, race once, and the event ends there. IRL works differently.
- League versus one-off event: IRL runs on a season structure with two races per year and ongoing standings, not a single race weekend.
- Team competition versus individual focus: success depends on full-team pacing and rotation across three subteams, not one runner’s time.
- Promotion and relegation: teams move between tiers based on performance, much like professional sports leagues.
- Broad eligibility: high school teams compete alongside adult teams, widening the field beyond typical relay events.
- Prize opportunities: payouts extend across the professional field, not just to a single winner.
This combination gives IRL a structure closer to a professional sports league than a typical race calendar.
How Should Runners Prepare for an IRL Race?
IRL’s own pages do not publish specific training guidance, so the advice below reflects general best practice for team relay and endurance racing, not official league instruction.
- Build endurance gradually: Long-distance base training supports the repeated effort required across multiple legs.
- Practice repeated efforts: Short recovery windows between legs call for training that mimics that pattern, not just single long runs.
- Plan recovery between legs: Stretching, hydration, and short rest periods help runners perform across their full rotation.
- Train for mixed terrain: Since leg difficulty and terrain vary, practice on hills, trails, and flat sections builds versatility.
- Coordinate as a team: Shared strategy sessions before race day help runners align on pacing and van logistics.
How Can Runners Join the Infinite Running League?
Getting a team into IRL follows three steps.
- Sign up: Create an account as a runner or team manager, and set up a basic profile.
- Join or create a team: Runners can join an existing roster or build one from scratch.
- Secure a spot: Select a race, complete registration, and confirm payment.
Registration currently runs through IRL’s waitlist while the platform finishes development.
What Can Teams Compete For?
Teams compete for more than a finish time. League position determines standing across the season. Strong results can drive promotion into a higher group. Professional status brings access to guaranteed prize payouts, since 60% of secured revenue goes to winning teams. Payouts extend beyond first place, so every professional team earns a share based on its finish.
Infinite Running League FAQs
- How many runners are on an IRL team?
Each team carries 30 runners, split into three 10-runner subteams covering male, female, and co-ed divisions. - How many runners on a relay team does IRL require per subteam?
Every subteam within an IRL team carries 10 runners, which brings the full team total to 30 runners. - How far is a relay race in IRL?
An IRL race covers roughly 200 miles per subteam, split across three legs for each runner. - How many races happen per year?
IRL runs two races each year, giving teams a focused season built around two high-stakes events. - How many legs does each runner complete?
Each runner completes three legs during a race, rotating through a fixed order with teammates. - Can high school teams participate?
Yes. High school teams are eligible to compete in IRL, alongside adult club and independent teams. - How do I join a team?
Sign up on the IRL platform, then join an existing team or start a brand new one. - How does promotion work?
Top teams in Group C move up each season, while bottom teams in Groups A and B move down. - What are the different IRL groups?
Group A and Group B hold professional teams, while Group C holds amateur teams across the league. - Is IRL a relay race?
Yes, IRL runs as a relay league where runners rotate through fixed legs across each event.
Ready to Take on the Infinite Running League?
IRL gives runners a structured, season-long alternative to single-event racing. Team strategy, promotion stakes, and guaranteed prize payouts set it apart from a typical relay weekend. Runners ready for that kind of challenge, from high school teams to seasoned club runners, can join the Infinite Running League waitlist and start building a team today.