This location is very close to Kings Valley Cemetery where kites apparently nested in the early/mid-2000s (Jim Fairchild may recall when, I think he was working on a remodel of a house in Kings Valley at the time).
The area around the cemetery continued to be a fairly reliable place for kites into the early 2010s, but since then the habitat has gotten much more densely wooded as then-young trees have grown up. But the landscape off Price Creek Rd. and Pit Rd. is still open, thanks to a cattle ranching operation and a Christmas tree farm (which has some ecologically conscious owners). The habitat is also used by a sizable population of Oregon Vesper Sparrows in April-July, possibly a dozen pairs.
The other place in NW Benton County where kites are fairly regular is off of Priest Rd. closer to Wren, and along Hwy 20 a bit west of there toward Blodgett (near the weigh station).
On Fri, 2018-02-09 at 17:12 -0800, Hendrik Herlyn wrote: > Just to avoid further confusion, I should clarify that the White-tailed > Kite location is in NW Benton Co., not NE, as I erroneously wrote in my > initial post. > > Price Creek Rd. (also labeled Christenson Rd. on some maps) is about .75 > miles south of Maxfield Creek Rd., off Kings Valley Hwy (Hwy 223). About a > mile east of Kings Valley Rd., Price Creek Rd. connects with Pit Rd., which > leads north to Maxfield Creek Rd. I found the kite by scanning west across > the open area from the high point of Pit Rd. > > For additional directions, check the map for my eBird list: > https://ebird.org/view/checklist/S42624037 > > Good luck! > > Hendrik >