There are
1,808 mi
from Boulder, CO to Peekskill, NY
That's the driving distance. It would take 1 day 8 hours to go from Boulder, Colorado to Peekskill, New York.
The flight distance (direct flight from Boulder, CO to Peekskill, NY) is 1,636.80 mi.
1,808 mi = 1.61 kms