Aztec, Eagle, or Burro Wash will take you down to the river. Wait, one of those leaves you a little farther up from the river, with a half mile hike....I think that's Aztec. if you go to Nelson's Landing, past techatticup mine at the end of pavement, you can go down to a, well, landing.......there is dirt road that goes west, and that has a branch that takes you farther down the river, as far as I know.
LOTS of dirt roads out there and palces to get lost.....on top of stunning scenery! one of my favorite places to go.
just need to get the Jeep off-roadable.