Buffalo Bayou Loop is a 4.8 mile moderately trafficked loop trail located near Houston, Texas that features a river and is rated as moderate. The trail is primarily used for hiking, walking, nature trips, and birding and is accessible year-round.
I run this loop at least once a week. Easy to run, walk, or bike. There's plenty of places to start or bridges to cross, so it's easy to switch it up and keep from getting bored.