The IRONMAN Leeds Marathon: Four Laps Around Roundhay Park

The Course in Brief

In the 2025 edition, the IRONMAN Leeds marathon was described as four laps of roughly 10km around Roundhay Park, which serves as the event hub. It's not a flat marathon: the descriptions point to hilly terrain. For 2027 there's no verified official map in the sources consulted, so details on laps, aid stations and crossing points should be checked on the official website once published. But the lap format around the park is the heart of the event and is unlikely to change.

The Double-Edged Sword of a Lap Course

Four laps with frequent passes through the finish area cut both ways.

The good side: the support is constant, your family sees you four times plus any intermediate passes, and mentally you can break the marathon into four 10km blocks. For many age-groupers this is more manageable than a lonely point-to-point.

The bad side: on the first lap you're fresh, the crowd is roaring, and the temptation to go out hard is massive. On the fourth lap, you'll run past the finish arch knowing you've still got 10km to go. You need to get there with your legs, not just your head.

Pacing a Hilly Course After a Tough Bike

The Leeds bike is rolling, with reported elevation gain between 1,800 and 2,500m depending on the source. That means you'll start the marathon with more muscular fatigue than usual. Concrete rules:

• First lap: the slowest of the four. Set a pace 10-15 seconds per km slower than your average target. If you feel good on lap three, you have plenty of time to make it back.
• Walk the climbs if you need to. On hilly terrain, walking 30 seconds uphill and running the rest is often faster than dragging yourself through 42km.
• Use the laps as nutrition checkpoints. Every pass through the park is a reminder: have you eaten? Have you drunk? On a lap course it's easy to keep a routine.

Specific Training

• Do your long runs on rolling routes, not on the track or a flat riverside path. Your body needs to learn the pace changes the terrain demands.
• Include fatigued runs: a hilly long bike + 40-60 minutes of running at race pace over rolling terrain. It's the most faithful simulation of Leeds.
• Train first-lap discipline: on long runs, force yourself to run the first 10km deliberately slow and measure how much it costs you psychologically. At Leeds, with the park crowds, it'll cost twice as much.

Weather and Kit

August in Yorkshire can mean sun, rain or both in the same day. Pack a spare top and a lightweight gilet or arm warmers in your run bag: if it rains and the temperature drops, running wet for 4-5 hours becomes a serious problem. Precise air temperature data isn't available in the sources: prepare for variability.

For Your Supporters

The format is ideal for spectating: whoever comes with you can stay in the park area and see you every lap without moving. Agree a fixed spot beforehand and what you need to hear (or not hear) on lap three, when it'll be tough.

What to do now: start planning your long runs on rolling terrain right away and set a lap-based pacing plan, with the first lap explicitly slower. Then, as soon as the official 2027 map comes out, check the number of laps and aid station locations and adjust your plan.