The One to the Castle - Windsor Trail Half Marathon

The One to the Castle is a scenic point-to-point trail half marathon from Marlow to Windsor, following riverside paths and countryside trails with iconic Thames-side landmarks.

The One to the Castle - Windsor Trail Half Marathon offers a memorable riverside route from Marlow to Windsor. The course follows trail paths near the River Thames and passes notable landmarks before finishing near the famous Windsor Castle.

Date: Sunday, 21 June 2026
Start time: 9.30am

Location: Riverwoods Drive, Marlow SL7 1QU, United Kingdom

• Distance: Half Marathon (21.1km)
• Route highlights: Riverside scenery, countryside trails, and a finish near Windsor Castle
• Price: £35