Robert Flynn's Echoes of Glory (published by Texas Christian University Press) won for Best Western Long Novel
Nonfiction-Biography: David C. Humphrey, Peg Leg (Texas State Historical Association).
Nonfiction-Contemporary: Charles H. Harris III and Louis R. Sadler, The Secret War in El Paso: Mexican Revolutionary Intrigue, 1906-1920 (University of New Mexico Press).
Check the list for others at http://www.westernwriters.org/spur_award_history.htm where the lists go back to 1959.
The convention's in Knoxville in June.