"Love Our Lake Day" marks the completion of a brand new amphitheater and four-acre park at the south end of the lake, Oakland spokesman Harry Hamilton said.
Brown will join Oakland Mayor Jean Quan, Rep. Barbara Lee and city councilwoman Patricia Kernighan to celebrate the lake's "transformation" as a result of various improvement projects financed by voter-approved bond Measure DD, Hamilton said.
Other enhancements to Lake Merritt include the renovation of the Municipal Boathouse, the 18th Street Pier and several improvement projects at Children's Fairyland.
Attendees can enjoy live music, salsa dancing, free bike rentals and food trucks throughout the day in neighborhoods surrounding the lake.
The dedication ceremony is expected to begin at 2 p.m.