Entries are now open for the Lighthouses Challenge, which is sponsored by Zurich Isle of Man.
The event, which takes place on July 3, will raise money for Cruse Bereavement Care IOM, and every donation will by match funded by the Z Zurich Foundation.
Cyclists can ride the quarter, half or full circle course, with all finishers receiving a medal when they cross the finish line.
The challenge is limited to 700 riders - you can enter at www.lighthouseschallenge.im