Live tracking for a relay race where the tracker passes between runners

If you mean one live tracker that gets handed from runner to runner, Relay Iowa describes exactly that: each team gets a GPS unit, and the active runner carries it “like a baton”; friends and family can follow its location. Coverage can be spotty where cell service is poor. (relayia.org)

If you’re looking for an option for your own race, it depends on whether you need GPS location or just team coordination:

• Race-provided GPS tracker: Ask the race organizer whether they issue a shared tracker and provide a live map. This is the closest match to a pass-along device.
• RaceJoy: Phone-based GPS tracking for relay runners; the active runner carries a phone with tracking enabled, and others can follow them. It requires cell reception. (racejoy.net)
• TeamSplits: A shared dashboard for tracking legs and recording handoffs, but it’s for progress and coordination—not GPS location tracking. (teamsplits.com)

What race are you asking about, and do you need a physical tracker passed between runners or would phone-based live location work?

The right setup depends on whether you can give each runner their own device, so here are the options.

Option 1: One shared tracker passed like a baton. This is simple and cheap, but the map only shows the person holding the device. Relay Iowa uses this model, where the GPS is passed from runner to runner like a "baton," and the runner currently on the course should always wear it. The weak point is the handoff itself. If the device changes hands late, the dot shows the previous runner for a while. Also, if the runner is in an area with poor or no cell coverage, the live tracking will directly reflect that poor cell coverage.

Option 2: Each runner carries their own tracker or phone. This avoids the handoff problem entirely. RaceJoy, for example, uses the runner's phone as a GPS tracker, and its relay feature lets relay team members track one another's position live on race day (including the team van). Teammates can see each runner's location at all times, not just the current one.

Option 3: Use leg logging to mark handoffs. Even with one device per runner, you still need to know when a leg starts and ends. RaceJoy's setup has runners wait to click "Start Leg" until you actually begin your leg, and it allows leg finish times to be added for those who do not activate their leg by clicking the "Manual" tab. A simple version of this is a button each runner presses at the exchange.

Apps built for relays:

• DUDE, Where's My Team? is designed around live leg tracking and handoff alerts, so the whole team sees who is on the course and when the next exchange is due. It also keeps a timestamped log of leg starts and ends.
• TeamSplits offers live leg-by-leg progress, projected finish times, and team leaderboards for Hood to Coast and other relay races.
• Contineo tracks runners with a device worn on the wrist, with progress calculated against a registered course path.

Official timing at exchanges: If this is an organized race and not just for your team, the timing company can put mats at each exchange zone. At each exchange zone, a timing mat records the BIB crossing, which gives each leg a split time. Chip-based timing is more accurate than phone GPS for official results.

My suggestion: If you have a phone or tracker for every runner, use Option 2 with a leg-start button or exchange-zone check-in. Pick a device with a long battery life and consider one with offline storage, since RaceJoy mentions Store and Forward of a participant's performance when travelling through a section without cell service. If you only have one device, Option 1 works, but agree on a handoff rule in advance, such as switching the tracker in the exchange zone before the receiving runner starts.

Live tracking for relay races where a physical tracker is passed between runners typically relies on specialized, ruggedized GPS baton trackers or integrated timing systems designed to maintain a continuous data stream as the device moves from one athlete to the next.

How the Technology Works

To ensure seamless tracking throughout the relay, race organizers generally use one of the following approaches:

• Custom GPS Baton Trackers: These are purpose-built devices designed to be handed off exactly like a traditional relay baton. Unlike consumer fitness trackers, these are often built for high durability, long battery life (to last the duration of the entire race), and reliable global cellular connectivity. Because the same device travels the entire course, the "live dot" on the spectator map remains consistent, providing a continuous trace of the team's progress.
• Integrated Timing & Tracking Systems: For events that do not use a single physical baton, some organizers use active transponder systems. In these setups, "Track Boxes" or sensors placed at exchange zones or along the course detect the signal from a runner's transponder. While these are often used for split times, advanced systems can use these signals to update a live leaderboard or map, effectively "handing off" the tracking status from one athlete's ID to the next in the race software.
• Smartphone-Based Relay Tracking: For smaller or charity events, apps allow teams to "pass" the tracking responsibility. In this model, the team uses a single race app. When a runner finishes their leg, they "hand off" the active tracking session to the next teammate via the app, which then begins broadcasting the new runner's GPS location.

Key Considerations for Organizers

If you are looking to implement this for an event, consider these factors:

• Continuity: The primary benefit of using a physical baton tracker is that spectators and race officials see a single, uninterrupted path on the map, rather than "jumps" between different runners' locations.
• Logistics: Owning or renting a fleet of dedicated baton trackers eliminates the need for runners to use their own devices, which helps with battery management and ensures consistent performance regardless of the runners' personal phones.
• Connectivity: In remote or trail-based relays, ensure the trackers utilize reliable networks (some offer Iridium satellite connectivity for areas without cellular coverage).
• Branding: Many custom tracker providers allow you to wrap the baton devices in your event’s branding, turning them into a professional part of the race identity.

If you are planning an event, companies such as RunnerBeam, RaceTracker, and Racemap specialize in these hardware-led tracking solutions, providing the devices, the cellular backbone, and the spectator-facing map interfaces.

Yes—this is usually handled with one team GPS tracker passed like a baton. It stays with whoever is running, so spectators follow the team’s current location rather than switching between individual runners. Relay Iowa, for example, describes issuing one tracker per team and passing it runner to runner; live updates depend on cellular coverage. ¹

Options:

• If your race provides a tracker: Use the event’s tracking link or app and follow its handover instructions.
• For an informal relay: Keep one charged phone with the runner and share its live location. Strava Beacon, for instance, creates a link for safety contacts and updates roughly every 15 seconds when there’s cellular service. At each handoff, pass the phone and make sure location sharing continues. ²
• For spectator-friendly team tracking: Some race platforms combine runner GPS and timing data into a single relay-team view; availability depends on the event. ³

For a DIY setup, secure the phone in a waist belt or pouch, enable location and background-data permissions, and test the handoff before race day. Cellular dead zones can delay updates. ¹²

Sources: ¹ Relay Iowa live GPS tracking · ² Strava Beacon help · ³ RaceJoy relay tracking