A new ultramarathon for the ultrarich costs more than $20,000 to enter and comes with butlers and Michelin-starred chefs

• A 120-mile marathon over four days in Scotland in April next year will set you back by $21,500.
• It comes with butlers, Michelin-starred chefs, hydrotherapy pools, and personalized training plan.
• The organizer calls it "the most exclusive, multi-day, luxury ultra-run experience on the planet."

Ultramarathons push the limits of human endurance and often involve tramping across muddied trails and uneven terrains alongside dozens of others.

But if you're looking for adventure with a side of luxury, there is the Highland Kings Ultra Marathon in Scotland, which comes with butlers, Michelin-starred chefs, speed boats, and hydrotherapy pools, reported the BBC.

The four-day 120-mile adventure comes with an eye-watering price tag of 15,500 pounds ($21,500), the BBC said, and will only have 40 participants.

Organizer Primal Adventures, a luxury-travel company in Scotland, calls it "the most exclusive, multi-day, luxury ultra-run experience on the planet."

The price is not just for four days of adventure peppered with luxurious treatments. The competitors' journeys will begin seven months before the race - which is set for April 2022 - with personalized training from coaches including Jonathan Albon, an ultrarunning world champion.

"Each athlete will receive support from world-leading coaches and nutritionists, speedboat transfers and luxury accommodation on Scotland's most iconic island, as well as the comfort of athlete lounges to recharge," Matt Smith, founder of the company, told City AM, a London newspaper.

The 120-mile race will start from Dalness in Glencoe, west Scotland, and end in the Isle of Arran, an island off the west coast of Scotland. Participants will be required to trek an average of 30 miles a day across the country's mountainous terrain.

The race will be capped with a gala dinner with UK explorer Sir Ranulph Fiennes - a 77-year-old explorer who is the only living person to travel from pole to pole (and Ralph Fiennes' third cousin, once removed).

Primal Adventure did not immediately respond to a request for comment by Insider.