A walker attempting the Yorkshire Three Peaks was rescued after first reporting himself lost and then suffering chest pains.
The Cave Rescue Organisation was alerted by police about 1.50am on Sunday.
The 22-year-old man said he was lost but uninjured.
A team spokesperson said: “Six minutes later, Yorkshire Ambulance Service reported a 999 call from the same number, requesting assistance for someone with chest pain.
“Again, no location other than ‘near some trees’. Although other members and a search dog were sent to key access points, preparatory to searching, the driver of CRO 4, [the team’s] Honda Pioneer ‘side by side’ quad, soon found him, up Long Lane, Clapham.
“He was returned to CRO base and handed over to the ambulance paramedics.”
The Yorkshire Three Peaks Challenge entails summiting Pen-y-ghent, Whernside and Ingleborough in a 39km (24-mile) route within 12 hours.