Read Thread: Hoping to find a box in southeast Oregon
There's a box 35755 named PV in Jordan Valley. http://www.letterboxing.org/BoxView.php?boxnum=29228
It looks like your route takes you very close to Ontario Oregon? There are 4 driveby boxes there, found in 2018.
Thank you both for responding! Just got one in Ontario.
That's great! Thanks for letting us know :) Happy Trails to you!