Compiled and fact-checked by Tommo, Verus founder · Last verified August 2026 · Spot an error?
Running · Marathons
Radyr Trail Marathon 2027
- Race day
- Saturday, 8 May 2027
- Location
- Radyr, Cardiff, UK, UK
- Distance
- 26.2 mi / 42.2 km
Radyr Trail Marathon: expected 8 May 2027, from Cardiff Harlequins Ground, Radyr. Entry, route, a pace chart and the race-day forecast.
Radyr Trail Marathon Race Timeline
240 days to go
More than 84 days out — a good window to build a consistent base before marathon-specific training ramps up.
Radyr Trail Marathon: quick answers
When is the next Radyr Trail Marathon?
The next date hasn't been published by the organiser yet. The most recent Radyr Trail Marathon was Saturday, 8 May 2027, and the race has usually run around the same point in the year.
Where does Radyr Trail Marathon start?
Radyr Trail Marathon starts at Cardiff Harlequins Ground, Radyr. The organiser hasn't published a finish location.
How many miles is Radyr Trail Marathon?
Radyr Trail Marathon is 26.2 miles (42.2km).
How much does Radyr Trail Marathon cost to enter?
c.£30 entry
Key Race Metrics & Overview
- Date
- Saturday, 8 May 2027
- Distance
- 26.2 miles / 42.2km
- Location
- Radyr, Cardiff, UK, UK
- Start Point
- Cardiff Harlequins Ground, Radyr
- Surface
- Trail/countryside, hills, woodland
Not published by the organiser at the time of writing: finish point, start time, cut-off time, age requirement, tracking app. Verus records these as unconfirmed rather than estimating them — check the official race website closer to race day.
Direct Entry Summary
c.£30 entry
Ballot Policy
No ballot — entry is direct through Radyr & Morganstown Festival (entries via Ridge Runners).
Radyr Trail Marathon Race Day Weather
A real forecast appears here once one exists for race day — usually about a week to ten days out. Nothing is shown until then, because a made-up forecast is worse than none.
Radyr Trail Marathon Route Map & Elevation Profile
Starting at Cardiff Harlequins Ground, Radyr. The organiser hasn't published a finish location. Total elevation gain is not published for this event, and Verus does not estimate one.
Is Radyr Trail Marathon flat?
No official elevation figure is published for this course, so Verus doesn't state one. The organiser describes the going as: trail/countryside, hills, woodland.
Radyr Trail Marathon Course Profile
Elevation change not published for this event.
Tap a point on the course for details.
Cardiff Harlequins Ground, Radyr
Start line.
Where Radyr Trail Marathon starts and finishes
Radyr Trail Marathon starts at Cardiff Harlequins Ground, Radyr. We haven't been able to place those on a map accurately enough to show one — a pin in the wrong place is worse than no pin.
These are the start and finish points, not the route. Verus doesn't hold course files for this race, and drawing a line between two pins would be a guess you might end up training on.
Full Radyr Trail Marathon Route Breakdown
Trail marathon (c.1,300m ascent) based in Radyr, a Cardiff council ward. No official date has been published for this edition yet; the date above is estimated from the event's usual annual pattern.
Radyr Trail Marathon Pace Calculator & Splits
Radyr Trail Marathon Pace Calculator
Enter a target finish time to see your pace and projected splits.
Average pace / mile
9:10
Average pace / km
5:42
Radyr Trail Marathon Pace Chart
Split markers calculated for standard checkpoints — no official pacers are confirmed for this event.
| Target | Pace /mi | Pace /km | 5K | 10K | Half Marathon | 30K | Finish |
|---|---|---|---|---|---|---|---|
| 3:00 | 6:52 | 4:16 | 21:21 | 42:41 | 1:30:04 | 2:08:04 | 3:00:00 |
| 3:15 | 7:27 | 4:37 | 23:07 | 46:15 | 1:37:34 | 2:18:44 | 3:15:00 |
| 3:30 | 8:01 | 4:59 | 24:54 | 49:48 | 1:45:05 | 2:29:25 | 3:30:00 |
| 3:45 | 8:35 | 5:20 | 26:41 | 53:22 | 1:52:35 | 2:40:05 | 3:45:00 |
| 4:00 | 9:10 | 5:42 | 28:28 | 56:55 | 2:00:05 | 2:50:46 | 4:00:00 |
| 4:15 | 9:44 | 6:03 | 30:14 | 1:00:29 | 2:07:35 | 3:01:26 | 4:15:00 |
| 4:30 | 10:18 | 6:24 | 32:01 | 1:04:02 | 2:15:06 | 3:12:06 | 4:30:00 |
| 4:45 | 10:53 | 6:46 | 33:48 | 1:07:36 | 2:22:36 | 3:22:47 | 4:45:00 |
| 5:00 | 11:27 | 7:07 | 35:34 | 1:11:09 | 2:30:06 | 3:33:27 | 5:00:00 |
| 5:30 | 12:36 | 7:50 | 39:08 | 1:18:16 | 2:45:07 | 3:54:48 | 5:30:00 |
| 6:00 | 13:44 | 8:32 | 42:41 | 1:25:23 | 3:00:08 | 4:16:08 | 6:00:00 |
| 6:30 | 14:53 | 9:15 | 46:15 | 1:32:30 | 3:15:08 | 4:37:29 | 6:30:00 |
| 7:00 | 16:02 | 9:58 | 49:48 | 1:39:37 | 3:30:09 | 4:58:50 | 7:00:00 |
Radyr Trail Marathon Finish Time Estimator
Enter a recent 5K, 10K or Half Marathon time to estimate your Radyr Trail Marathon finish time.
Your 5K time
Estimated Radyr Trail Marathon finish
3:59:36
An estimate only, based on Pete Riegel's race-time prediction formula. Real marathon performance depends on endurance, training specificity, pacing and race-day conditions — not just your speed over a shorter distance.
Training for a different distance? Try the full pace calculator, race time predictor or pace chart.
Got your target time? Save it to your profile.
Tag Radyr Trail Marathon, set your goal pace, and let Verus track your countdown, training and fundraising in one place.
Start Your Verus JourneyRadyr Trail Marathon Race Day Checklist
Tap items to mark off your race-day readiness.
- Race number attached, and any timing chip fitted per your race pack instructions
- Weather-appropriate kit, plus something warm and disposable to discard before the start
- A plan for reaching Cardiff Harlequins Ground, Radyr
- A meeting point agreed with family and friends for after the race
Training Strategy for Radyr Trail Marathon
16-20 weeks is the target window for first-time marathoners; 12-16 weeks is solid if you're already maintaining a baseline mileage. Arrive with your longest run behind you in training, not on race day itself.
This is a largely flat course, so most of your long runs can mirror that — flat and steady, building time on feet rather than hill strength.
Reduce overall mileage across the final 2-3 weeks while preserving short race-pace bursts. Arrive at Cardiff Harlequins Ground, Radyr fresh, energized, and primed — not fit, fresh.
Lock in your target pace using the interactive splits calculator below — no official pacers are confirmed for this event, so a pace band on your watch is the more reliable option.
Test your race-day fuel and hydration plan on your long training runs, not for the first time on race day — check the Race Day Checklist below for what's actually on this course.
Marathon Nutrition & Fueling Plan
A deliberate increase in carbohydrate over the two to three days before the race is the well-established approach at marathon distance.
Eat a carbohydrate-focused breakfast two to three hours before the start, and stick to something you've already tested in training rather than trying anything new.
Most runners take on carbohydrate every 30 to 45 minutes from about an hour in, alongside fluid at the on-course stations.
A mix of carbohydrate and protein in the hour or so after finishing supports recovery.
Radyr Trail Marathon Charity Places 2027
No formal charity-place scheme published — runners commonly fundraise for a charity of their own choosing.
Lead with your personal story — explain why the charity matters to you. Personal connection generates 3x more support than a generic link broadcast.
Share key training milestones on Instagram (first 10-miler, peak week, race week) with your fundraising link in bio. Publicly thanking donors prompts secondary gifts!
Running Radyr Trail Marathon for charity?
Link your JustGiving page to Verus and show up right here alongside other Radyr Trail Marathon fundraisers — goal, progress and story, all in one place.
Add Your Fundraiser to VerusTravel & Logistics
No road closures — the Radyr Trail Marathon is run off-road (Trail/countryside, hills, woodland), so local traffic is unaffected.
Radyr Trail Marathon Frequently Asked Questions
Everything you need to know for race weekend.
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Race details independently compiled and fact-checked by Tommo against the official Radyr Trail Marathon site , last verified August 2026. Always confirm official timings and policies directly prior to race day.