Compiled and fact-checked by Tommo, Verus founder · Last verified August 2026 · Spot an error?
Running · Ultra Marathons
London Lea Valley 50K 2027
- Race day
- Saturday, 20 March 2027
- Location
- The Lea Valley, London and Hertfordshire, UK
- Distance
- 31.1 mi / 50.1 km
London Lea Valley 50K: 20 March 2027, from The Lea Valley — see the official site for the 2027 start venue. Entry, route and a pace chart.
London Lea Valley 50K Race Timeline
191 days to go
More than 126 days out — a good window to build a consistent base before ultra-specific training ramps up.
London Lea Valley 50K 2027: quick answers
When is London Lea Valley 50K 2027?
London Lea Valley 50K 2027 takes place on Saturday, 20 March 2027.
Where does London Lea Valley 50K start?
London Lea Valley 50K starts at The Lea Valley — see the official site for the 2027 start venue. The organiser hasn't published a finish location.
How many miles is London Lea Valley 50K?
London Lea Valley 50K is 31.1 miles (50.1km).
How much does London Lea Valley 50K cost to enter?
Entry through Camino Ultra. A 25K Gratitude run and a 53-mile River Lea Ultra run alongside it.
Key Race Metrics & Overview
- Date
- Saturday, 20 March 2027
- Distance
- 31.1 miles / 50.1km
- Location
- The Lea Valley, London and Hertfordshire, UK
- Start Point
- The Lea Valley — see the official site for the 2027 start venue
- Surface
- The Lea Valley Walk — riverside path, canal towpath and reservoir track. Flat.
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
Entry through Camino Ultra. A 25K Gratitude run and a 53-mile River Lea Ultra run alongside it.
Ballot Policy
No ballot — entry is direct through Camino Ultra.
London Lea Valley 50K 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.
London Lea Valley 50K Route Map & Elevation Profile
Starting at The Lea Valley — see the official site for the 2027 start venue. The organiser hasn't published a finish location. Total elevation gain is not published for this event, and Verus does not estimate one.
Is London Lea Valley 50K flat?
No official elevation figure is published for this course, so Verus doesn't state one. The organiser describes the going as: the lea valley walk — riverside path, canal towpath and reservoir track. flat..
London Lea Valley 50K Course Profile
Elevation change not published for this event.
Tap a point on the course for details.
The Lea Valley — see the official site for the 2027 start venue
Start line.
Where London Lea Valley 50K starts and finishes
London Lea Valley 50K starts at The Lea Valley — see the official site for the 2027 start venue. 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 London Lea Valley 50K Route Breakdown
A 50K along the Lea Valley Walk, following the River Lea down through Hertfordshire towards London on flat riverside and canal towpath. A 25K and a 53-mile River Lea Ultra cover the same corridor.
London Lea Valley 50K Pace Calculator & Splits
London Lea Valley 50K Pace Calculator
Enter a target finish time to see your pace and projected splits.
Average pace / mile
7:43
Average pace / km
4:48
London Lea Valley 50K 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 | 5:47 | 3:36 | 17:59 | 35:58 | 1:15:52 | 1:47:53 | 3:00:00 |
| 3:15 | 6:16 | 3:54 | 19:29 | 38:58 | 1:22:12 | 1:56:53 | 3:15:00 |
| 3:30 | 6:45 | 4:12 | 20:59 | 41:57 | 1:28:31 | 2:05:52 | 3:30:00 |
| 3:45 | 7:14 | 4:30 | 22:29 | 44:57 | 1:34:51 | 2:14:52 | 3:45:00 |
| 4:00 | 7:43 | 4:48 | 23:59 | 47:57 | 1:41:10 | 2:23:51 | 4:00:00 |
| 4:15 | 8:12 | 5:06 | 25:28 | 50:57 | 1:47:29 | 2:32:51 | 4:15:00 |
| 4:30 | 8:41 | 5:24 | 26:58 | 53:57 | 1:53:49 | 2:41:50 | 4:30:00 |
| 4:45 | 9:10 | 5:42 | 28:28 | 56:57 | 2:00:08 | 2:50:50 | 4:45:00 |
| 5:00 | 9:39 | 6:00 | 29:58 | 59:56 | 2:06:27 | 2:59:49 | 5:00:00 |
| 5:30 | 10:37 | 6:36 | 32:58 | 1:05:56 | 2:19:06 | 3:17:48 | 5:30:00 |
| 6:00 | 11:35 | 7:12 | 35:58 | 1:11:56 | 2:31:45 | 3:35:47 | 6:00:00 |
| 6:30 | 12:32 | 7:48 | 38:58 | 1:17:55 | 2:44:24 | 3:53:46 | 6:30:00 |
| 7:00 | 13:30 | 8:23 | 41:57 | 1:23:55 | 2:57:02 | 4:11:45 | 7:00:00 |
London Lea Valley 50K Finish Time Estimator
Enter a recent 5K, 10K or Half Marathon time to estimate your London Lea Valley 50K finish time.
Your 5K time
Estimated London Lea Valley 50K finish
4:47:21
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 London Lea Valley 50K, set your goal pace, and let Verus track your countdown, training and fundraising in one place.
Start Your Verus JourneyLondon Lea Valley 50K 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 The Lea Valley — see the official site for the 2027 start venue
- A meeting point agreed with family and friends for after the race
Training Strategy for London Lea Valley 50K
20-24 weeks is the realistic window for a first 31.1-mile ultra, assuming you already have a marathon's worth of base behind you. The block that matters is back-to-back long weekends — a long run on Saturday followed by a second, slower one on Sunday — which builds time on feet and teaches you to run on tired legs without the recovery cost of one enormous day. Practise your race-day nutrition on every one of them; at this distance the stomach fails before the legs do.
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.
Drop volume hard across the final three to four weeks — further out and steeper than a marathon taper, because a 30-mile training day costs weeks of recovery, not days. Keep some easy running and a little terrain-specific work in, but the goal is to reach The Lea Valley — see the official site for the 2027 start venue with fresh feet and a rested gut rather than one more long run in the bank.
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.
31.1-Mile Ultra 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.
London Lea Valley 50K 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 London Lea Valley 50K for charity?
Link your JustGiving page to Verus and show up right here alongside other London Lea Valley 50K fundraisers — goal, progress and story, all in one place.
Add Your Fundraiser to VerusTravel & Logistics
No road closures — the London Lea Valley 50K is run off-road (The Lea Valley Walk — riverside path, canal towpath and reservoir track. Flat.), so local traffic is unaffected.
London Lea Valley 50K 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 London Lea Valley 50K site , last verified August 2026. Always confirm official timings and policies directly prior to race day.