About 450 miles, , Iggy to Seney is about 150, Seney to Copper is 300 miles, My house to the Mariner parking lot is 299 & I am just South of Seney. Did both ways many times, Mileage estimate should be pretty close if you do a direct route. Don't know your riding style but probably would be best to do the one way trip in 2 days then you could see some other sights on the way, stay in Munising, or Lanse or somewhere in between those towns the first night. Make it a 4 day trip & do it during the week if you can. Have fun & do it!