I first approached the trail from the stairs on SW 4th Avenue but choose to not go down more than a dozen steps. I crossed I5 twice more to get around past Fulton Park to SW Custer Street.
Thursday, October 29, 2020
45.46928333333334, -122.68321944444445
google map 
45.4698818, -122.6878667
45.4691294, -122.6858604
The creek exposed itself along side the stairs. Elsewhere it was behind chain link fence providing limited access to the interstate.