Cardiff Half Marathon took place on Sun, Oct 4, 2026 in Cardiff, United Kingdom. The main route is 21.1 km.
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- Date
- Sun, Oct 4, 2026
- Start
- Cardiff 🇬🇧
- Distance
- 21.1 km
- Climbing
- 61 m
- Level
- Open to all
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Start freeThe Cardiff Half Marathon features a predominantly flat and fast course taking runners past the capital's most iconic landmarks, historic buildings, and scenic waterfronts.
What this race demands
The Cardiff Half Marathon requires sustaining a steady aerobic pace over a flat 21.1-kilometer road course.
Aerobic endurance
Covering the half marathon distance of 21.1 kilometers requires sustained cardiovascular output without extended periods of relief.
Pacing discipline
The predominantly flat profile of the course encourages an aggressive early pace, requiring strict discipline to avoid premature fatigue.
What would it take you?
Pick the level closest to yours for an estimate of finish time on this course and the training a solid preparation needs.
Estimated finish
1:50–2:15
Peak-week training
5–7 h/week
A model estimate from distance, climbing and level, not a promise. Conditions, drafting and pacing move it.
IntervalCoach turns those weekly hours into a concrete plan built around your actual fitness. Start with this race as your goal
Frequently asked questions
When is Cardiff Half Marathon?
Cardiff Half Marathon took place on Sun, Oct 4, 2026 in Cardiff, United Kingdom.
How long is Cardiff Half Marathon?
The main route is 21.1 km.
What does Cardiff Half Marathon demand?
The Cardiff Half Marathon requires sustaining a steady aerobic pace over a flat 21.1-kilometer road course.
How much climbing does Cardiff Half Marathon have?
Cardiff Half Marathon has 61 m of climbing.
Who is Cardiff Half Marathon for?
Cardiff Half Marathon is open to all participants.
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