Police said officers responded to the crash on a service road that provides access to the bed of the Los Angeles River north of Willow Street.
Police believe a driver in a red sedan was headed southbound on Atlantic Avenue at a high speed when he or she hit the woman in a marked crosswalk.
Police do not yet have the driver in custody, a spokeswoman said.
Officers were first called to the area of 12th Street and Long Beach Boulevard, near St. Mary Medical Center, at about 2:25 a.m. on Dec. 15, police said.
Detectives believe a driver in a 2003 Mercury sedan was going east on PCH shortly before 7:15 p.m. when he hit a parked vehicle before hitting a pedestrian who was trying to cross the street outside a crosswalk.
Charges were filed against a man Friday for a 2018 road-rage incident that involved two other vehicles in Long Beach.
Officers were called to the area of Anaheim Street and St. Louis Avenue at about 11:50 a.m. on Sunday about the hit-and-run crash, spokeswoman Allison Gallagher said.
Officers were called to the scene just after 1:40 a.m. about a person down near Woodruff Avenue and Willow Street.
The family of Velton Johnson has put together a $10,000 reward for information leading to the arrest and conviction of the hit and run driver, his older brother Garry Johnson said.
The driver of the older model grey SUV, only described as a man, stopped temporarily after the crash but then fled southbound on Atlantic Avenue before officers got there, police said.