Compiled and fact-checked by Tommo, Verus founder · Last verified August 2026 · Spot an error?
Running · Half Marathons
Welwyn Half Marathon 2026
- Race day
- Sunday, 4 October 2026
- Location
- Welwyn Garden City, Hertfordshire, UK
- Distance
- 13.06 mi / 21.0 km
Welwyn Half Marathon: 4 October 2026. Entry, the Cole Green Way course, charity, a pace calculator.
Welwyn Half Marathon Race Timeline
24 days to go
This is where the real training happens — building your long run and getting comfortable with half-marathon race-pace.
Welwyn Half Marathon 2026: quick answers
When is Welwyn Half Marathon 2026?
Welwyn Half Marathon 2026 takes place on Sunday, 4 October 2026, starting at 9:30am.
What time does Welwyn Half Marathon start?
Welwyn Half Marathon starts at 9:30am from Gosling Sports Park, Stanborough Road, Welwyn Garden City.
Where does Welwyn Half Marathon start and finish?
Welwyn Half Marathon starts at Gosling Sports Park, Stanborough Road, Welwyn Garden City and finishes at Gosling Sports Park, Stanborough Road, Welwyn Garden City.
How many miles is Welwyn Half Marathon?
Welwyn Half Marathon is 13.06 miles (21km).
How much elevation gain does Welwyn Half Marathon have?
Welwyn Half Marathon has approximately 400ft of total elevation gain. Generally flat and rolling rather than genuinely hilly — the organizer's own interactive elevation tool shows a gentle profile across the course (around 400ft of total gain) with no named climbs.
How much does Welwyn Half Marathon cost to enter?
Entry is direct via Active Training World — no ballot. Half Marathon entry was £39-£41 as of Aug 2026; always confirm current pricing on the official site.
How can I track a runner at Welwyn Half Marathon?
No dedicated live-tracking app is advertised for this event — check the official ATW event page for updates closer to race day.
Key Race Metrics & Overview
- Date
- Sunday, 4 October 2026
- Distance
- 13.06 miles / 21.0km
- Location
- Welwyn Garden City, Hertfordshire, UK
- Start Point
- Gosling Sports Park, Stanborough Road, Welwyn Garden City
- Finish Point
- Gosling Sports Park, Stanborough Road, Welwyn Garden City
- Start time
- 9:30am
- Elevation gain
- 400 ft (122m)
- Surface
- Track start/finish, plus the traffic-free Cole Green Way (a disused railway path)
- Cut-off time
- Three hours, after which marshals and course signage are no longer guaranteed.
- Age requirement
- Runners must be 17 or over on race day.
- Tracking app
- No dedicated live-tracking app is advertised for this event — check the official ATW event page for updates closer to race day.
Direct Entry Summary
Entry is direct via Active Training World — no ballot. Half Marathon entry was £39-£41 as of Aug 2026; always confirm current pricing on the official site.
Ballot Policy
No ballot — entry is first come, first served via Active Training World.
Welwyn Half 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.
Welwyn Half Marathon Route Map & Elevation Profile
Starting at Gosling Sports Park, Stanborough Road, Welwyn Garden City and finishing at Gosling Sports Park, Stanborough Road, Welwyn Garden City. 400 ft of total elevation gain across 13.06 miles.
Is Welwyn Half Marathon flat?
Generally flat and rolling rather than genuinely hilly — the organizer's own interactive elevation tool shows a gentle profile across the course (around 400ft of total gain) with no named climbs.
Welwyn Half Marathon Course Profile
400 ft total elevation gain.
Tap a point on the course for details.
Gosling Sports Park, Stanborough Road, Welwyn Garden City
Start line.
Cole Green Way
+400ft (122m) — A traffic-free former railway path — most of the course's gentle, rolling elevation change happens along this stretch, with no single named climb.
Where Welwyn Half Marathon starts and finishes
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. The official course map is the one to use: view it on the organiser's site .
Full Welwyn Half Marathon Route Breakdown
Starts and finishes with a lap of the 400m track at Gosling Sports Park, heading out through the leafy outskirts of Welwyn Garden City onto the Cole Green Way — a traffic-free disused railway path — for a loop before returning the same way for a finishing lap on the track.
Welwyn Half Marathon Pace Calculator & Splits
Welwyn Half Marathon Pace Calculator
Enter a target finish time to see your pace and projected splits.
Average pace / mile
18:23
Average pace / km
11:25
Welwyn Half Marathon Pace Chart
Split markers calculated for standard checkpoints — no official pacers are confirmed for this event.
| Target | Pace /mi | Pace /km | 5K | 10K | Finish |
|---|---|---|---|---|---|
| 3:00 | 13:47 | 8:34 | 42:49 | 1:25:38 | 3:00:00 |
| 3:15 | 14:56 | 9:17 | 46:23 | 1:32:47 | 3:15:00 |
| 3:30 | 16:05 | 9:59 | 49:57 | 1:39:55 | 3:30:00 |
| 3:45 | 17:14 | 10:42 | 53:32 | 1:47:03 | 3:45:00 |
| 4:00 | 18:23 | 11:25 | 57:06 | 1:54:11 | 4:00:00 |
| 4:15 | 19:32 | 12:08 | 1:00:40 | 2:01:19 | 4:15:00 |
| 4:30 | 20:40 | 12:51 | 1:04:14 | 2:08:28 | 4:30:00 |
| 4:45 | 21:49 | 13:34 | 1:07:48 | 2:15:36 | 4:45:00 |
| 5:00 | 22:58 | 14:16 | 1:11:22 | 2:22:44 | 5:00:00 |
| 5:30 | 25:16 | 15:42 | 1:18:30 | 2:37:01 | 5:30:00 |
| 6:00 | 27:34 | 17:08 | 1:25:38 | 2:51:17 | 6:00:00 |
| 6:30 | 29:52 | 18:33 | 1:32:47 | 3:05:33 | 6:30:00 |
| 7:00 | 32:10 | 19:59 | 1:39:55 | 3:19:50 | 7:00:00 |
Welwyn Half Marathon Finish Time Estimator
Enter a recent 5K, 10K or Half Marathon time to estimate your Welwyn Half Marathon finish time.
Your 5K time
Estimated Welwyn Half Marathon finish
1:54:33
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 Welwyn Half Marathon, set your goal pace, and let Verus track your countdown, training and fundraising in one place.
Start Your Verus JourneyWelwyn Half 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
- Your own gels/fuel, since on-course water/gel station details weren't published at the time of writing
- A plan for reaching Gosling Sports Park — Welwyn Garden City station is around a 15-minute walk away
- A meeting point agreed with family/friends at Gosling Sports Park for after the race
Training Strategy for Welwyn Half Marathon
10-14 weeks is a solid window for a first half marathon; 8-10 weeks is enough if you're already maintaining a baseline mileage. Build your long run up gradually rather than jumping straight to race distance.
This course has real climbs — cole green way around mile 5 — so include some hill-repeat sessions midweek rather than relying only on flat long runs.
Reduce overall mileage across the final 7-10 days while preserving short race-pace bursts. Arrive at Gosling Sports Park, Stanborough Road, Welwyn Garden City 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.
Half Marathon Nutrition & Fueling Plan
A modest increase in carbohydrate intake over the 2-3 days before the race — not one huge pasta dinner the night before — is the sensible approach to topping up glycogen stores for a half marathon.
2-3 hours before the start, eat something carb-heavy that you've already used in training — race morning is the wrong time to try something new.
On-course water/gel station details weren't published at the time of writing — carry your own fuel if you have specific needs.
Refuelling with carbohydrate and protein soon after you finish is the well-understood way to kick-start recovery.
Welwyn Half Marathon Charity Places 2026
The event's official charity partner is Alzheimer's Research UK, with an optional donation add-on at checkout — there's no separate discounted charity-place scheme with other named charities published for this event.
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 Welwyn Half Marathon for charity?
Link your JustGiving page to Verus and show up right here alongside other Welwyn Half Marathon fundraisers — goal, progress and story, all in one place.
Add Your Fundraiser to VerusWhere to Stay for Welwyn Half Marathon
Welwyn Garden City town centre
The most hotel choice, a short journey from Gosling Sports Park and well connected by rail.
Not walking distance to the venue for most hotels.
Near Gosling Sports Park
Closest to the start and finish — realistic to walk on race morning.
A residential area with limited hotel choice.
Travel & Logistics
Welwyn Garden City railway station is around a 15-minute walk from Gosling Sports Park.
Limited paid parking is available at the venue, with additional parking in Welwyn Garden City town centre.
The Cole Green Way section is traffic-free rather than requiring full road closures — check the official site for specifics on any road-based sections.
Spectator & Cheer Guide
Gosling Sports Park itself, right by the start and finish, is the easiest spot to watch from.
Family and friends can also enjoy food and drink from on-site caterers while waiting near the finish.
No dedicated live-tracking app is advertised for this event — check the official ATW event page for updates closer to race day.
Welwyn Half 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 Welwyn Half Marathon site , last verified August 2026. Always confirm official timings and policies directly prior to race day.