Unless you take a boat by sea to El Valle, the only other option is first flying into Bahía Solano. It is about an hour flight from Medellín, Pereira or Cali. From the airport, it should be easy enough to hire a jeep or “chiva” for the 20 km./hour journey south from Bahía Solano to El Valle on the only stretch of road in El Chocó.
Be warned, during the wetter seasons there are parts of the road that are impassable. When rivers burst their banks, the mud on the road can be very deep, yet the authorities are attempting to pave the only route.