sentences:  The course then winds around site of the former Reunion Arena and onto the Houston Street Viaduct for almost two miles (3 km), passing over the Trinity River.After a turn around on Zang Boulevard in Oak Cliff, the race moves on the Jefferson St. Viaduct, "The Mile Long Bridge" parallel to the Houston Strett Viaduct.On Jefferson, runners can see the beautiful Dallas skyline as they reenter Downtown.