Naismith's rule, not connected with basketball, is a rule of thumb that helps plan what popular activity?
Bushwalkers Dayhike Bushwalker Day hike Bushwalking Hiking Hiking (land) Hikers Take a hike Hiker Hikes Back country hiking Tramping Bush walking
bushwalker bush walking bushwalkers hikes tramping dayhike take hike day hike hikers hiking hiking land bushwalking hiker back country hiking
hiking
WikipediaEntity
Hiking