The Hounslow Classic is one epic Blue Mountains sky run. It is a weekend of gnarly and spectacular trail racing which encompasses the best that Blackheath and the Grose Valley Wilderness has to offer.

Synonymous with brutal climbs, steep technical terrain and jaw-dropping valleys, runners traverse along the tops of sheer sandstone cliffs, dive deep into canyon trails passing through ancient landscapes, and ascend rocky peaks with 360-degree views of the chiselled Grose Valley.