It's been over 20 years since I rode these trails and from what I hear, they've been somewhat cut down from what I originally remember.
The trails are located in Memorial Park, which is in the heart of Houston.
Location: Houston, TX
From Austin, I-290 east about 2 and a half hours to loop 610 south. Take 610 to Memorial Drive east and follw that to the park.
View Google Map
Technical Level: Medium to high (for Houston)
Trails: A wide variety of trails from gravel up through somewhat technical rocky trails.
Shade: Medium to good shade
Post Ride Beer: None, get the hell back to Austin as fast as you can
GHORBA trail discussion
Category: East of Austin