The High Plains stop at the Caprock, about 30 miles east of Lubbock. The Rolling Plains are next, and usually considered in the Panhandle/South Plains.
I think Bowie is more in the Blackland or Post Oak Belt.....I used to know all those areas, but soils classes were a long time ago...
But I know what you mean, there is a gap between the Metromess and Childress that doesn't really fit any TexAgs region.
[This message has been edited by CanyonAg77 (edited 1/12/2010 10:13p).]