A ride to Mount Rushmore is very doable in 8 days! We had a KLR 650, Honda 650XL, and V-strom. Day three 9am we were at the Bad lands, followed by Mount Rushmore, Needles, Crazy Hourse, Lead and Deadwood. Day Four we left Sturgis for Devils Tower and were in Livingston North of Yellowstone that evening. For a bit more relaxed ride try a ride up to the Adirondacks. You could take two leasurly days to get there, ride the park and surrounding area for four days and be back home easy with the last two days.