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 bushwalking hikes hiker bush walking day hike hiking hiking land back country hiking dayhike tramping take hike hikers bushwalkers
hiking
WikipediaEntity
Hiking