From Dallas:
About 82 miles miles from central Dallas; estimated time: 2 hours, 15 minutes.
Drive south on I-35 towards WACO
Merge onto I-35E S/US-77 South
I-35E S/US-77 S becomes I-35E S/US-67 South
Take the US-67 SOUTH exit, exit number 423A, towards Cleburne
Merge onto US-67/SR-144
Stay straight to go onto US-67
Turn left onto Barnard St.
This will take you to the center of Glen Rose

From Houston:
About 300 miles from Houston; no estimated time.
North on Interstate 45 toward Dallas for 201 miles
Take a left onto Highway 287 going west toward Waxahachie for about 30 miles
turn left (heading south toward Cleburne) on Highway 67 for about 48 miles.