MORE than 200 mountain bike enthusiasts will be putting themselves to the test this weekend.

Lightwater Valley will be the setting on Sunday for the annual mountain bike races and time trials organised by Ripon Rotary Rowels Club.

The taxing course will be manned by Rotarians and other volunteers and the event will be in aid of the Yorkshire Air Ambulance.

The club have set themselves a £10,000 fund-raising target and main sponsor Chevin Cycles of Otley have donated a mountain bike for a raffle.