[Let The Bushwhacking Begin!]
Beginning with Power Walk #6, you will be leaving the nice little 2-track road you've been following and strike off cross-country, bushwhacking along the fence line. You won't be on that road again; you'll come back on the other road you could see when you parked. (Don't forget to keep an eye out for the wicked cacti.)
I call bushwhacking "going into Adventure Mode" and, truthfully, there's no "whacking" to be done here, as the "bush" is of the scrubby sagebrush variety, easily avoided, & they've done nothing to earn a whacking. 
After this cache you head into some pretty country.