Since the nineties, the mountain biking course in Overijse and Huldenberg has been a well-known route. At the time, it was one of the first permanent mountain biking routes in Flanders. After years of service, there was a need for the renewal of the outdated route.

The renewed mountain biking route "The 2 Valleys" in the territory of Overijse and Huldenberg has three new mountain biking loops:

• the red loop of 23 km with 13 km unpaved starting from Overijse (Begijnhof)
• the blue loop of 22 km with 13 km unpaved starting from Sint-Agatha-Rode (Church)
• the green loop of 12 km with 8 km unpaved starting from Terlanen (Church Square)

For experienced mountain bikers, the new red, blue, and green loops can also be combined into a total route of 57 km. The renewed route is a total of 24 km longer than the old route and contains more than 34 km of unpaved paths.

Characteristic of a route in the Grape region is that there are a total of more than 700 elevation meters, with challenging slopes and technical singletracks, making it a true playground for mountain bikers from the wider area.