Races Half marathon · Waltham Cross, UK
Lee Valley Half Marathon
Lee Valley Half Marathon is a flat half marathon in Waltham Cross, UK, held each March. The organiser describes the event course as traffic-free, flat and fast, starting and finishing at the Lee Valley White Water Centre. The surface is road. March in the Lee Valley is cool and often breezy, with typical temperatures of 3 to 11°C. On a course as flat as Lee Valley Half Marathon, even splits are everything; the classic mistake is banking time in the first third.
Page rebuilt 2026-11-14 · race facts not independently verified — confirm dates and entries on the official race site
When
March
next: Sunday 21 March 2027
Course
flat
Half marathon
Conditions
March in the Lee Valley is cool and often breezy, with typical temperatures of 3 to 11°C.
Racing this course well
The organiser describes the event course as traffic-free, flat and fast, starting and finishing at the Lee Valley White Water Centre. The surface is road.
On a course as flat as Lee Valley Half Marathon, even splits are everything; the classic mistake is banking time in the first third.
Getting a place
Official Lee Valley Half Marathon site →Checked November 2026
Race day
- Next race
- Sunday 21 March 2027
- Also on the day
- 10k
The course in numbers
The course starts and finishes at the Lee Valley White Water Centre on traffic-free roads.
- Surface
- Road
Getting there
- Rail station
- Waltham Cross
Pick your goal for Waltham Cross
Pace charts, weekly structure and timelines for the most common half marathon goals:
The date shown is the one the organiser has announced. Change it if yours differs.
Build your training around Lee Valley Half Marathon.
RunV works backwards from race day to today. Your plan adapts when life interrupts, and you approve every change. It does not adapt to this specific course — the pacing guidance above is where the course knowledge is.
Everything above stays free and complete — this is an optional next step, not a paywall.
Asked often
- When is the Lee Valley Half Marathon?
- The next Lee Valley Half Marathon is on Sunday 21 March 2027 in Waltham Cross, UK. It is held each March.
- Is the Lee Valley Half Marathon course flat?
- The organiser describes the event course as traffic-free, flat and fast, starting and finishing at the Lee Valley White Water Centre. The surface is road.
- How should I train for the Lee Valley Half Marathon?
- Train specifically for Waltham Cross — terrain, conditions, goal pace — and let the plan flex around real life. With RunV Premium you can adapt your plan to fit your week.
Not sure what to target? Predict your half marathon time from a recent race →
More half marathon races
Supplements research for this distance
Build for Waltham Cross — around your actual life
RunV engineers your block backwards from race day in March — and adapts it when training doesn't go to script. You approve every change.
