What is the oldest tree in Riverside?
The oldest tree in Riverside that we map is the Parent Washington Navel Orange Tree, about 150 years old, planted by Eliza Tibbets in 1873 at what is now the corner of Magnolia and Arlington avenues. It is California Historical Landmark number 20, maintained by UC Riverside and the city, and still bearing fruit at the December 2025 harvest. Since 2019 it has stood inside a 22-foot insect-screen tent to keep out citrus greening disease, so you see it through the screen.
The four landmark trees spread across Riverside, and all four are free and on public ground. Start at the corner of Magnolia and Arlington avenues, where the Parent Navel Orange Tree stands in a small city landmark plot looked after by UC Riverside and the city's Parks Department. Since June 2019 it has lived inside a 22-foot insect-screen tent against citrus greening disease, so you see it through the screen; older photographs show it without. About 400 metres away, Low Park sits at the head of Magnolia and Palm avenues, and the Chicago White Sox Redwood Tree stands there beside the tablet Charles Comiskey added in 1927. The Roosevelt Palm is about three kilometres off on Victoria Avenue near Myrtle Street, a street listed on the National Register of Historic Places, and it shares a small plot with five other palms; look for the 1965 tablet at its foot. The Native Sycamore stands on a median island where La Paz Lane meets Bubbling Well Road, by Fairmount Park, about six kilometres north of the orange. See it from the pavement, since crossing to the island means stepping into traffic. We have not checked bus routes between them.
One of Riverside's trees also appears in The Oldest Tree in Every City We Map.