I hiked the Sims Bayou Hike & Bike Trail - Section 2 as a part of a longer hike that included Townwood Park and several miles of undocumented trail along Sims Bayou out to Hwy 288. You can read my log of that hike here as well as view the track file.
The Sims Bayou Hike & Bike Trail - Section 2 trail is a paved asphalt trail that runs along the north bank of Sims Bayou. There is no signage of any kind.