Outdoor activities including rugby, football, golf, shinty, fishing, riding, canoeing, athletics, and multi-sports are popular in the Western Isles. The Hebridean Challenge is an adventure race run in five daily stages, which takes place along the length of the islands and includes hill and road running, road and mountain biking, short sea swims and demanding sea kayaking sections. There are four main sports centres: "Ionad Spors Leodhais" in Stornoway, which has a 25 m swimming pool; Harris Sports Centre; Lionacleit Sports Centre on Benbecula; and Castlebay Sports Centre on Barra. The Western Isles is a member of the International Island Games Association.