 It bends to the southeast to cross the new Maroon Creek Bridge, with the original, listed on the National Register of Historic Places, immediately to its south.At this point, with a golf course on the north side, the Aspen city limit begins to follow the road, and by the time it goes through a roundabout and passes the Holden/Marolt Mining and Ranching Museum to the south it is fully in the city of Aspen.Another stream crossing, Castle Creek, brings the highway into the developed portion of the city.