Red Bull Timelaps - a one-day, 25-hour team cycling challenge in Windsor Great Park (+ video)

Starting on midday on Saturday 28 October and finishing at noon the following day, the event will see up to 150 teams of four riders take on a 6.6 kilometre closed circuit inside the park in the shadow of Windsor Castle in Berkshire.

Only one rider from each team will be allowed on the circuit at a time, meaning that "participants will have to demonstrate a mixture of strategic nous, endurance and determination to overcome the challenge."

The winner will be the team completing most laps within the 25 hours - and to spice things up, laps completed on a special shorter circuit during a 'Power Hour' starting when the clocks go back at  2am will count double.

Organisers say that the event will see Windsor Great Park "opening its gates to a cycling road race for the first time ever" - although in fact, it hosted the individual and team road races at the 1948 London Olympic Games.

They add: "The park’s well-surfaced, undulating and traffic-free roads will provide the perfect location for the race."

Team entries cost £250 or £200 if all riders are aged under 25, and you can also enter as an individual, in which case organisers will hook you up with three fellow riders to form a team.

Head here to enter or to find out more information.