There is no club, no ground and no fixture list here — the nearest Lao League 1 side is Luang Prabang, four hours south — so sport means climbing to viewpoints, paddling the Nam Ou, and long walks between villages.
Nearest top-flight football is Luang Prabang
Nong Khiaw has no team and no stadium. The closest Lao League 1 club is Luang Prabang FC, about four hours south by minivan, playing at Luang Prabang Stadium; fixtures are not published reliably, so ask locally once you are down there.
Pétanque and takraw in the village
Every Lao village has a sand pétanque court and a takraw net, and games start in the late afternoon once the heat drops. Watching is welcome, joining usually is too if you ask — and you will lose.
The season decides what is possible
November to March is the walking season: dry steps, cool mornings, clear light on the karsts. May to September brings mud, leeches and cloud that hides the viewpoints entirely, while the Nam Ou runs high and fast — better for paddling, worse for everything else.
Use a licensed guide and stay on the path
Northern Laos is heavily contaminated with unexploded ordnance from the war, which is exactly why the established agencies keep groups on known trails. Freelance offers at the bridge or the boat landing are cheaper and not worth the risk.
Longer river-and-mountain routes booked from Luang Prabang
Operators such as Tiger Trail sell five-day Luang Prabang to Nong Khiaw itineraries stitching biking, trekking, caves, waterfalls and the Nam Ou into one trip. These are far easier to arrange before you come north than from a village with patchy internet.