Macmillan Cancer Support has only five people signed up from the district for this year’s Yorkshire Three Peaks Challenge.
It is now appealing for more walkers to join the 25-mile challenge on July 13 which last year attracted 365 people.
The challenge takes in the summits of Pen-y-ghent, Whernside and Ingleborough and passes features such as the Ribblehead Viaduct.
Registration costs £35 and the charity would like walkers to raise £200 each in sponsorship.
Team Macmillan supports its entrants with newsletters and training guides and is on hand during the hike.
More details at 0300 1000 200 or www.macmillan.org.uk/yorkshire3peaks