1/24 mini crawler course. Built on a 4x8 table with removable legs for transport. The legs are just 2x4s, so they can be modified to fit your liking. It will fit through a 30" doorway when turned on its side. Not terribly heavy.
The Moab desert has many features to test your skills. A few steep climbs, a tunnel, an arch and two bridges. Un-modified trucks may struggle in some areas. The riverbed is filled with pebbles for some realism.