I find this whole idea of "taking walks around a track to keep your affair secret" bizarre. Who DOES that? Was there something special about the BYU track? If BYU was an it place, why not a tête à tête in the library? The student union?
Here are 100 walks/hikes within 100 miles of Rexburg:
100 Hikes within 100 Miles of Rexburg - Explore Rexburg
There's a nature park in town....
Or....genius thought... they could have spent their valuable time scouting locations for their heavenly tents for the 144k camping couples minus LVD, CD, and pals, since they weren't into camping, tents, or all that icky stuff. Come to think of it, maybe they were scouting the arena...