DOWNTOWN. Guadalupe River Park and Gardens is a 150-acre natural haven in the heart of San Jose. In addition to being a refuge for migratory and song birds, the three-mile long riverside park offers 2½ miles of scenic walks and jogging trails. Located adjacent are the Guadalupe Gardens, which feature over 3700 varieties of roses. River Park and Gardens hosts several festivals and concerts each year and provides ample picnic facilities for folks with outdoor dining in mind. A benefit of the park is that it serves as a buffer for potential river flooding that could harm downtown San Jose.