Races in the United Kingdom

London Marathon and the London World Athletics Championships sit at the top of a packed UK calendar. Ultra Trail Snowdonia, the Lakeland 100, and the Spine Race headline the trail scene; HYROX and parkrun were both invented or scaled here, so the urban functional-fitness side is unusually strong. Most road races run April through October; trail and ultra events extend into the winter Spine season. Weather variance is the planning challenge, not heat — pack for everything.