Event Information

Online entry for this event has now closed. Entry on the day will be available, subject to a £5 surcharge. Payment will be accepted by card only; further information can be found here.

You’ve stumbled across a mind-gripping, leg-burning, heart-racing and thrilling trail run in the heart of Surrey at Loseley Park, perhaps better known as ‘Broadlands’ in Netflix’s The Crown.

The Loseley Park 10K and 5K trail run is set against the stunning backdrop of Loseley House, which has hardly changed since it was built in the 16th century using reclaimed stone from Waverley Abbey.

With 1,400 acres to play with, the route will take you down a sandy section of the historic North Downs Way, on tractor ruts over the fields and along (and up, and down) muddy, winding trails through the woods – watch out for Muntjac and Roe deer gambolling amidst the bluebells!

The climbs won’t be the only thing to steal your breath – the view from the top of the Hog’s Back Ridge is spectacular – and you’ll also be treated to a scenic downhill stretch in your final kilometre.

Both distances are challenging – you WILL find it tough, and you WILL get muddy – just don’t forget your trail running shoes!

For event updates and future promotions, follow AAT Events on Facebook, Twitter and Instagram. You can also join our Strava club to see how your fellow competitors are training and compare your event day performance.

Event Manager: Lynsey

Hey, I’m the Event Manager for Loseley Park 10K. Please feel free to contact me if you have any questions about this event, or follow me on Instagram to check out all the behind-the-scenes action!


Chris's review of our brand new Loseley 10k & 5K event!

I ran this event on the 18th April 2021. What a fantastic day for running, re-connection and positivity.
The route is a glorious jaunt around the local trails, featuring the 16th century Loseley House and a small section of the North Downs Way. There’s plenty of elevation in both races (approx 220m in the 10k), which provided an exciting race and decent challenge for runners of all abilities.
This was also one of the first races hosted after lockdown at the start of 2021. It was heart warming to see the running community come together and re-connect after a really tough period in many people’s lives. AAT made the runners feel safe and supported, and this event was really appreciated as an important step back into running, social contact and legging it up hills!
Looking forward to the 2022 event on 10th April…
Chris Ambassador Chris Ambassador

Event Information


Hilly trail run. Expect to get your trail runners muddy!


Loseley 5k

Loseley Park 10k

📍 Venue

Loseley Park, Guildford, GU3 1HS

Free parking, toilets and registration are available at the venue.


Enjoy a steaming hot coffee before or after your event from Greenhills Mobil Coffee Bar


The Greenhills Mobile Bar

🚲 Travel

We strongly recommend cycling or walking to this event. Loseley Park is a 3-mile cycle from Guildford Town Centre.

Surrey Fox Ultra Marathon Half Relay Trail Run

🅿️ Parking

If you are driving to this event,  there is free parking is available at Loseley Park. There will be parking marshals on hand to direct you.


ℹ️ Registration

Collect your race number (with integrated timing chip) from Loseley Park on the day of the event.


🎒 Bag Drop

You may store your bags in our van which will be parked at the finish line. We do not accept responsibility for loss or damage.

Bag Storage

🚽 Toilets

There will be portaloos available near the start line.


🗒️ Event Programme

Registration details, including information about race packs, will be confirmed here and communicated to all entrants by email.

⏱️ Results

This event is professionally chip-timed. We aim to provide you with reliable next day results!

👟 Recommended Kit

Earphones: If you choose to use earphones, we recommend using Shockz bone-conducting earphones at an appropriate volume. You must be aware of your surroundings and be able to hear marshals at all times.

Trainers: We recommend wearing a comfortable pair of trail shoes. Fitstuff offer a free professional shoe-fitting service to ensure that you get the perfect pair.

Socks: For maximum comfort – and to avoid getting blisters – ensure you wear a proper pair of running socks. aat events recommend Hilly Socks.



🏅 Medals

All finishers will be rewarded with a bespoke Loseley Park 10K or 5K medal.


Enjoy a refreshing Non-Alcoholic beer from UNLTD