Ben Nevis is the highest mountain in the UK, at 1,344 metres.
The Snowdon horseshoe is an excellent day's mountain walking along spectacular ridges, and takes in four mountain tops within around seven hours.
The Yorkshire Three Peaks Challenge involves climbing the three highest mountains in the Yorkshire Dales, often within 12 hours.
The Welsh 3000s is a very challenging mountain endurance challenge, involving the ascent of 15 mountains over a 25 mile course.
The Four Peaks Challenge is an extension to the popular Three Peaks Challenge, with the addition of the Northern Irish mountain of Slieve Donard.
Snowdon is the highest mountain in Wales, and can be climbed in around five hours.
The Welsh Three Peaks Challenge is becoming a popular charity challenge, involving the ascent of the highest mountains of north, mid and south Wales.
Climb the highest mountain of England and Wales for any charity. Taking around five hours, with no specialist equipment required, the walk includes great views of the Lake District.
The National Three Peaks Challenge is the most popular charity challenge in the country, and involves climbing the highest mountains of Scotland, England and Wales, often within 24 hours.
Known for it's invention as a selection exercise for the SAS, the Fan Dance is a 24km trek across Pen Y Fan in the Brecon Beacons National Park.
Open Events don't have a fixed date, and can usually be self-organised or booked
as a package.
On these events, you can raise money for any