Buck says the most challenging terrain of the trip was California Hill -- the upper crossing of the South Platte River -- in Brule, Nebraska.

(Courtesy Rinker Buck)

This show first aired on 12/30/2015.

Some of our favorite Colorado Matters conversations involve conventional travel -- whether by foot, bike, wagon, train or, one day soon, driverless cars. Click the audio above to travel with us.

  • "Seeing America Slowly": Journalist Rinker Buck recounts his covered-wagon crossing of the Oregon Trail with his brother, three mules and one dog.
  • "Ways to the West": Author Tim Sullivan says an unhealthy dependence on cars threatens the West's sustainability. So he road tripped across the region without one.
  • The winners and losers of driverless cars: Colorado author Rutt Bridges predicts these cars will reduce traffic and put taxi drivers out of work.