On December 21, 2025, the Portsmouth Coastal Waterside Marathon Events returns with a beloved festive running experience along the flat, multi-terrain route beginning and ending on the Southsea seafront. Participants may choose from a certified full marathon, the Festive Half Marathon (13 miles), or the challenging 50 km ultra‑marathon, each winding around Langstone Harbour via coastal paths and beachside trails. The course is super‑flat, ideal for personal bests or a winter training milestone. Along the route, fully‑stocked aid stations offer festive treats (like Jaffa Cakes or tipples), and runners enjoy enthusiastic crowd support and holiday cheer. Post‑race, the finish zone features medals, hot refreshments, and community spirit. Organized by Believe and Achieve Events / FitPro Rob, the event benefits local charities like The Elizabeth Foundation, and entry is limited (approx. 1,000 marathon spots). The coastal views, sand flats, and festive atmosphere make this a memorable December race in southern England.
Races
50 km
Marathon
Half Marathon
Race Date:
21 December, 2025
All events are part of the Portsmouth Coastal Waterside Marathon Events 2025, produced by Believe & Achieve Events Limited (operating as Fit Pro Rob), and scheduled for Sunday, 21 December 2025, at Clarence Esplanade, Southsea, Portsmouth, Hampshire, UK. The flat, coastal courses are well regarded for PR potential, festive on-course entertainment (mulled wine, seasonal treats), and community support across all distance options.
Weather based on historical averages.
FAQs
What is the Portsmouth Coastal Waterside Ultra 50km?
How long is the Portsmouth Coastal Waterside Ultra 50km?
Where does the Portsmouth Coastal Waterside Ultra 50km take place?
What is the elevation gain of the Portsmouth Coastal Waterside Ultra 50km?
How can I prepare for the Portsmouth Coastal Waterside Ultra 50km?
How do I choose the right training plan for the Portsmouth Coastal Waterside Ultra 50km?
All events are part of the Portsmouth Coastal Waterside Marathon Events 2025, produced by Believe & Achieve Events Limited (operating as Fit Pro Rob), and scheduled for Sunday, 21 December 2025, at Clarence Esplanade, Southsea, Portsmouth, Hampshire, UK. The flat, coastal courses are well regarded for PR potential, festive on-course entertainment (mulled wine, seasonal treats), and community support across all distance options.
The Portsmouth Coastal Waterside Ultra 50km is 50km long.
The Portsmouth Coastal Waterside Ultra 50km takes place in Portsmouth, Hampshire, UK.
Runna classifies the Portsmouth Coastal Waterside Ultra 50km elevation profile as Flat.
The best way to train for the next race is to use a personalized training plan that takes into account your current running ability, schedule, and preferences.
This will help you steadily improve your running performance and get ready for the race without risking an injury.
Check out our training plans to find the best running program for your goals!
Which plan you choose will depend on your experience, schedule, objectives, and the date of the race.
Runna offers personalized training plans for every runner and every goal: Whether this is your first, 10th or 100th race, we'll help you get the most out of your training and smash your goals.
Check out our training plans to find the best running program for your goals!
What is the Portsmouth Coastal Waterside Ultra 50km?
All events are part of the Portsmouth Coastal Waterside Marathon Events 2025, produced by Believe & Achieve Events Limited (operating as Fit Pro Rob), and scheduled for Sunday, 21 December 2025, at Clarence Esplanade, Southsea, Portsmouth, Hampshire, UK. The flat, coastal courses are well regarded for PR potential, festive on-course entertainment (mulled wine, seasonal treats), and community support across all distance options.
How long is the Portsmouth Coastal Waterside Ultra 50km?
The Portsmouth Coastal Waterside Ultra 50km is 50km long.
Where does the Portsmouth Coastal Waterside Ultra 50km take place?
The Portsmouth Coastal Waterside Ultra 50km takes place in Portsmouth, Hampshire, UK.
What is the elevation gain of the Portsmouth Coastal Waterside Ultra 50km?
Runna classifies the Portsmouth Coastal Waterside Ultra 50km elevation profile as Flat.
How can I prepare for the Portsmouth Coastal Waterside Ultra 50km?
The best way to train for the next race is to use a personalized training plan that takes into account your current running ability, schedule, and preferences.
This will help you steadily improve your running performance and get ready for the race without risking an injury.
Check out our training plans to find the best running program for your goals!
How do I choose the right training plan for the Portsmouth Coastal Waterside Ultra 50km?
Which plan you choose will depend on your experience, schedule, objectives, and the date of the race.
Runna offers personalized training plans for every runner and every goal: Whether this is your first, 10th or 100th race, we'll help you get the most out of your training and smash your goals.
Check out our training plans to find the best running program for your goals!
More
Sport:
Running
Tags:
Coastal
Major City
This event listing is for informational purposes only. Runna is not affiliated with, endorsed by, or sponsored by Portsmouth Coastal Waterside Marathon Events 2025 or Believe and Achieve Events Ltd. All event details are based on publicly available information and are provided solely to help users discover running events. Runna does not use any official logos, images, or proprietary content from this event or its organiser. Any trademarks or names mentioned are used descriptively to identify the event in a factual manner. For the most accurate and up to date information (including to register or purchase an entry to the event), please visit the Portsmouth Coastal Waterside Marathon Events 2025 website.
