Alvarado Hot Springs was a 20th-century geothermal well in Los Angeles County, California, United States.

A bathhouse was built next to the water and a therapeutic spa was operated on the site for several decades.

[4] The water was pumped up to a tank for recreational-therapeutic use and the gas was used to heat the bathhouse.

[4] The bathhouse was located just off Fifth Avenue, roughly three miles southeast of the town limits of La Puente.

[5][4] As described in 1926, the Alvarado Hot Springs spa was on the far slope of the Alvarado Ranch "in the hills about a mile and one-half west of the Otterbein road that runs south from Valley boulevard...The route to the springs is fairly circuitous but well signed and the road leads at last to a towering wooden oil well derrick mounted on a knoll from which much of the valley and Old Baldy in the distance Is visible.