The Pony Express Geocache Challenge requires that you get one Geocache in each of the eight states of the route, plus two additional, for a total of ten. Each must be near a Pony Express marker or other landmark. Details are here.
The Pony Express Geocache Challenge requires that you get one Geocache in each of the eight states of the route, plus two additional, for a total of ten. Each must be near a Pony Express marker or other landmark. Details are here.