There are
955 mi
from Thornton, CO to Baraboo, WI
That's the driving distance. It would take 17 hours 28 mins to go from Thornton, Colorado to Baraboo, Wisconsin.
The flight distance (direct flight from Thornton, CO to Baraboo, WI) is 823.02 mi.
955 mi = 1,536.92 kms