On Sundays, Uchibori Dori (the main road east of the palace) is partially closed to traffic to make way for a 3km cycle course.
Directions
Reception is next to the police box near Exit 2 of Nijubashi-mae Station
Hours
10:00-15:00 (Sundays only). Closed in the event of rain
Cost
You can rent bikes for free but they can only be used on the course