Dark, wet, and — with the right kit — entirely runnable
The Dark Evenings
Irish winter running is defined less by cold than by darkness. On the winter solstice, Dublin gets barely seven and a half hours of daylight, with the sun down by around four in the afternoon — and the west coast, further from the low winter sun's best angle, feels the loss even more. Anyone training for a spring marathon is, by necessity, a headtorch runner for three or four months of the year. Club sessions move to well-lit loops, GAA pitches with floodlights, and canal towpaths with streetlighting. A hi-vis vest stops being optional gear and becomes the first thing you put on, before the watch. Club nights swell in winter for exactly this reason — running in a group along an unlit country road is safer and considerably less bleak than running it alone.
Underfoot
Ground conditions matter more than temperature. Irish winters rarely produce hard frost or snow for long, but they produce mud, standing water and leaf-slick paths in quantity. Trail shoes with real grip earn their keep from November to March, and even road runners often swap to a winter shoe with a slightly more aggressive sole. Puddles that look shallow frequently aren't; a runner who's done a few winters here learns to read the surface rather than trust it. Forest trails and towpaths in particular can hold standing water for days after rain, so a route that's dry and firm in September may be genuinely boggy by January — worth scouting in daylight before committing to it in the dark.
Layering for a Climate That Won't Commit
The single hardest thing to get right is the layering, because Irish winter weather changes its mind mid-session. A cold, still morning can turn to horizontal rain within twenty minutes. The usual solution is a base layer, a light windproof that packs down small, and gloves that can come off and go in a pocket — dressing for the run you'll be doing in forty minutes' time, not the one you're starting. Runners who stick with it through January and February tend to find spring races feel considerably easier than they otherwise would, partly through fitness and partly through sheer relief at running somewhere that isn't dark, wet and six degrees.
From Running Ireland by F Cosgrove — a guide to the races of the island. Every race in the book is on our race map, county by county, with the month it usually falls in.