Idaho’s Ugliest Sweater Run, brought to you by The Dirty U

City insight: Boise

Boise is the capital of Idaho, with a greenbelt along the Boise River and trails in the foothills right at the edge of the city, and a very active outdoor culture. The climate is semi-arid: summers (June to August) are hot and dry, autumn is mild and colourful, winters (December to February) are cold with some snow, and spring is changeable. Spring and autumn are the best seasons for racing, with cool, clear mornings. Boise Airport serves the city.