Columbia Basin I-82 Alternative
Benton City to Prosser
I commute from Grandview to Pasco daily on my bike. Sometimes I take the long way home, deviating from the freeway at Benton City, and following the horse heaven ridge all the way back, starting at Chandler Hill. I've attatched the GPX Starting at Benton City, and ending at the HWY 221 overlook above prosser.
Taken slow, most of the trail is pretty easy. Depending on the time of year, could be dry and dusty, muddy, icy, whatever. I guess that's pretty obvious though. Starts out a gravel road up the hill, then you deviate and follow a two-track up to some radio towers. After that, the trail is mosly well maintained, until you get to the second half. The trail somewhat disappears in a couple of places, but it's pretty easy to find your way. Hope you enjoy, let me know if you try it out!