Hah! I found it. The route was still in my inside jacket pocket. Anyhow here it is...
Starting in Denton:
I35 to Loop 288 East
Loop 288 East to exit for FM428
FM428 East to Aubrey
FM428 thru Aubrey to FM1385 (turn right) 1/2 mile
FM1385 to FM428 again (turn left)
FM428 to FM455 to Celina
FM455 thru Weston to Anna (Hwy 5)
Hwy5 north (turn left) 1/2 mile to FM2862 (turn right)
FM2862 to Westminster (FM533)
FM533 turn left to FM3133 (north-west)
FM3133 to Hwy5 again, Van Alstyne
Hwy5 turn right (north to Howe)
Howe was the destination. We had lunch at a place called Finn's. Good catfish!
Return route:
FM902 East to Tom Bean and Hwy11
Hwy11 (turn left) West/North to FM697 (turn right, East)
(DPS/LEO CENTRAL!! so watch your speed.)
FM697 E to Hwy69 (turn right) South
Hwy69 (Whitewright) to Hwy160 S
Hwy160 S to FM121 (turn right)
FM121 thru Van Alstyne, cross 75 Central Expwy.
FM121 W to Tioga Hwy377 (turn left) South
Hwy377 S thru Pilot Point to FM455 W (turn right)
FM455 W thru Sanger (we actually ended the ride here)
to FM 2450 Bolivar (turn left) South
FM2450 South to Krum FM 1173 (turn left)
FM1173 East to I35 (back in Denton)
EDIT:
I will add that even though we cut the ride a little short we still put on over 170 miles...