Les Crêtes La Hulpoises is a Sunday race series in La Hulpe, Belgium, offering three loop options: the 17.7 km Crêtes, the 10 km Petites Crêtes, and the 2.3 km Mini-Crêtes for children. The courses are technical and hilly, presenting a local trail-style challenge rather than a flat road race. The longest route includes approximately 300 m of climbing, and the 10 km course has about 100 m of elevation gain.
The start line is on rue Eugène Castaigne, behind the École des Colibris, where bib pickup also occurs. The Mini-Crêtes has a limit of 120 children, while the two longer races are capped at 500 and 600 runners, contributing to a compact, local atmosphere. This series has been held for over forty years, with organizers maintaining the same three courses due to their success in prior years.