This morning we took some time to explore the site of the protest camp at Standing Rock, near Cannonball, North Dakota. The protesters have now all gone, though the arguments over the Dakota Access Pipeline are still ongoing.
From there we continued south, through Fort Yates and onward into south Dakota, stopping for the night in Eagle Butte, in the Cheyenne River Reservation.
I was one of five Scottish writers chosen by Edinburgh International Book Festival to undertake extraordinary journeys across the Americas in spring and summer 2017.
I will be travelling through the United States for three weeks, from north to south, beginning in North Dakota, through Appalachia, and ending in Louisiana. For much of this time I will be accompanied by the novelist Jennifer Haigh.
You can follow my progress on Twitter and Instagram, and keep up-to-date with all the travellers using the hashtag #Outriders.