When I saw this on Waynesboro's schedule, I too was surprised. Riverheads played a series with Clarke about a dozen years ago, and from RHS it was over 100 miles one way (from Greenville's exit 213 to the Rt. 7 exit-315) not to mention the extra few miles to get to the school. For Waynesboro, it would be within a mile or two of the same distance. That seems like a stretch for a non-district game but I guess sometimes they have to find games where they can find them.
In addition to the Leemen making the trip, as someone mentioned, hasn't Buffalo Gap traveled to Clarke in recent years during playoffs and maybe even Stuarts Draft as well? I can't keep them all straight.