The 3/6/24h Radmarathon Grieskirchen is a timed road cycling event using the Stadtplatz in Grieskirchen, Upper Austria. Riders select from 3-hour, 6-hour, and 24-hour formats, accommodating everyone from short-format racers to ultra-distance specialists on the same weekend. The 24-hour race forms the main part of the program, featuring solo riders, 2-person teams, 4-person teams, large teams, a business cup, and a solo Charity-Race. The 6-hour race includes solo and 2-person team categories, while the 3-hour race is a solo classification for women and men. The event typically attracts over a thousand cyclists, with Racemappr estimating participation between 1,200 and 1,300 riders.
The route is a 21.5 km loop on public roads, beginning and ending at Grieskirchen’s Stadtplatz. It passes Pollham, Furth, Kletzenmarkt, and Bad Schallerbach before returning to town. Each lap includes 173 meters of elevation gain, meaning 24-hour participants encounter a consistent build-up of climbs rather than a single defining ascent. RC Grieskirchen organizes the race, with the program extending beyond adult endurance events to include a children’s time trial and a youth race. A unique feature is the vintage classification for older racing bike technology, such as frame shifters and pedals with toe clips. The event holds significant standing in Austrian ultra-cycling, having awarded national ultra championships, 24-hour state championships for 2-person and 4-person teams, and connections to the 24-hour Cup and ÖM Ultra Solo.