show your park ticket from UO to enter free to city walk.
exclusions from this are when a special ticketed event is going on.
from the website:
2-Day Base + Park to Park Access Ticket
The 2-Day Base Ticket entitles one (1) guest admission to BOTH UOR theme parks on the same day for the duration of the base ticket. Ticket is valid for any two (2) calendar days during a fourteen (14) consecutive calendar day period which includes the first day any portion of the ticket is used. This ticket also includes fourteen (14) consecutive calendar days of admission to the paid entertainment venues of Universal CityWalk® ("CityWalk") which commences and includes the first day any portion of the ticket is used.
NOTE: Applicable sales tax and fees will be added to all ticket products.
The above Admission Media is non-refundable, non-transferable, and must be used by the same person on all days. Valid only during normal operating hours. Parks, attractions, or entertainment may: close due to refurbishing, capacity, weather or special events; change operating hours; and otherwise change or be discontinued without notice and without liability to the owners of Universal Orlando ® Resort ("Universal"). The above Admission Media specifically excludes admission to separately ticketed events at either of the Universal theme parks or within any of the CityWalk venues. Some CityWalk venues require ages 21 or older for admission. Does not include admission to AMC Universal Cineplex 20 or the Blue Man Group Show. Additional restrictions may apply and benefits are subject to change without notice. Unless otherwise stated, parking is not included and there are no discounts on food or merchandise. Valid Photo ID required.