Snow may still be lingering in gullies on the mountain tops as runners line up for the start of the 59th Three Peaks Race in the Yorkshire Dales on Saturday.

The race, which is billed as the “marathon with mountains”, starts at 10am in Horton-in Ribblesdale, near Settle, and takes competitors over a 23-mile course with 5,279 feet of ascent, including the summits of Peny- ghent, Whernside and Ingleborough.

The Three Peaks has Salomon as its main sponsor and the international mountain sports equipment company has five of its team among nearly 1,000 entrants.

Salomon team member Joe Symonds, 29, who won last year’s race in a time of 2hrs 55mins 58secs, is returning in a bid to equal the achievement of his father, Hugh Symonds, of Kendal Athletic Club, who won in 1984, 1985 and 1987.

But there are plenty of potential challengers. They include Salomon team members Tom Owens, 31, who won the race in 2011, and Ricky Lightfoot, 28, a fire-fighter from Maryport in Cumbria, who was second in 2009 and fourth last year.

A newcomer to the Three Peaks, which has a current course record of 2hrs 46mins 3secs, is a distinguished fourth member of the Salomon team Tofol Castanyer. The Spaniard is expected to be a runner to watch on Saturday.

Last year Castanyer, 40, won the 100 kilometre Courmayeur Champex Chamonix over the Grande Randonnee du Tour du Mont-Blanc – regarded as one of the toughest races in the world.

He was also first in the 2012 Spanish Cup and second in the 2012 Chamonix Marathon.

The Three Peaks has attracted 966 entrants. They include Mark Hinder from Australia, Tomas Mildorf from the Czech Republic, Brian Mullins and Steve Sweeney from the Republic of Ireland and Andoni Arriazu from Spain.

Jean-Marc Lawton, from Stornoway, completed his 21st Three Peaks in 2012. He is writing a history of the race, which had six competitors when it was first run from the Hill Inn at Chapel-le-Dale in 1954.

The oldest female and male entrants are both members of the race committee. Wendy Dodds, 62, of Clayton-le-Moor Harriers, the joint ladies’ winner in 1983, beat all the male over-60 entrants last year.

Bill Wade, of Holmfirth Harriers, was the youngest competitor when he first ran in 1962. When he starts his 47th race he will be 71 years and 11 months.

The youngest are both 19. Craig Boggon, runs for Holmfirth Harriers and Hannah Rhodes-Patterson is unattached.

The race starts in Horton-in-Ribblesdale at 10am with fast runners expected to take around 25 minutes to reach the summit of Penyghent (2,277ft). They should be at Ribblehead by 11.20am. Anyone who does not reach there by 12.10pm will be eliminated.

The record time from the start to Whernside summit (2,415ft) is 1hr 38mins. Runners who do not reach the checkpoint near the Hill Inn by 1.30pm will be eliminated.

Spectators on Ingleborough summit (2,372ft) can expect to see competitors from around 12.20pm with the winner returning to Horton by 12.50pm This year there will be no parking for spectators at the end of Philpin Lane near the Hill Inn. Spectators should note that the 61-mile Fellsman starts in Ingleton at 9am on Saturday.

Its competitors may be on Ingleborough and climbing Whernside as Three Peaks runners travel in the opposite direction.