The 2012 End-2-End mountain bike race has reached full capacity within a week of registration opening.
The sheer volume of cyclists wanting to compete in the 46-mile challenge saw organisers increase the event's capacity to 1,700 last year.
Organiser Steve Honeybone said: ‘The level of interest is amazing but we have to cap it for the riders' safety.’
More than 650 riders will travel to the Island to compete in the race in September.
Football: Corinthians beat Onchan to reach Railway Cup final
Premier league leaders hit four at The Bowl to progress
Cricket: Isle of Man's opponents confirmed for 2028 T20 world cup qualifiers
Manx squad to contest qualifier phase in Finland in August 2026
Snooker: Blinders and PSM Legion both win to go joint-top
Co-leaders claim home victories in latest fixtures
MGP Supporters club considering winding down operations
Organisation celebrated 50th anniversary this year
