The Southampton Marathon 2026 just got even more exciting.
We’re proud to announce that GU Energy is the Official Nutrition Partner of the ABP Southampton Marathon Festival 2026, supporting runners in both the Southampton Marathon and the Southampton Half Marathon.
If you’re training for the Southampton Marathon 2026, your race-day fuelling strategy just became much simpler.
GU Energy Gels at the Southampton Marathon 2026
On Sunday 3rd May 2026, runners taking part in:
will find GU Energy gels available at official aid stations along the course.
This means:
- Trusted endurance nutrition on course
- No unexpected fuel changes
- Consistency from training to race day
- Confidence when it matters most
When running a marathon in Southampton, fuelling properly can make the difference between surviving and finishing strong.
Why Nutrition Is Key for the Southampton Marathon
Training for the Southampton Marathon 2026 isn’t just about miles, it’s about strategy.
Energy gels support:
- Sustained energy levels
- Stable blood glucose
- Reduced fatigue in later miles
- Improved endurance performance
If you’re preparing for the Southampton Half Marathon or full marathon, practising your nutrition during long runs is essential.
Nothing new on race day.
25% Off GU Energy for Southampton Marathon 2026 Runners
To help you train with what you’ll use on race day, GU Energy has provided an exclusive 25% off RRP discount for our runners.
Use code: REES25
Shop here: https://guenergy.co.uk/discount/REES25
We recommend:
- Mixed flavour boxes to find your favourite
- The 8 Gel Selection Box - just £15 including discount
- Testing your fuelling plan during long training runs
Preparing early ensures you arrive at the Southampton Marathon 2026 confident and race-ready.
Why Enter the Southampton Marathon 2026?
The ABP Southampton Marathon Festival is one of the South’s most iconic running events.
When you enter the Southampton Marathon 2026, you get:
- Closed roads through Southampton city centre
- The Dock Gate 8 start line
- The famous Spitfire flyover
- Free official race photos
- An iconic medal - the first in the Penta Medal Series
The 2026 event marks the beginning of a five-year medal collection, forming the Hampshire Rose when completed from 2026–2030.
It starts here.
Secure Your Place at the Southampton Marathon 2026
Whether you’re running the 5K, 10K, Southampton Half Marathon or full marathon, 2026 is shaping up to be a landmark year.
Enter the Southampton Marathon 2026 today and start planning your training, nutrition and race strategy now.
We’ll see you on the start line.
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