In the summer of 1968, Caltech began construction of Big Bear Solar Observatory (BBSO) located on the north shore of Big Bear Lake.Due to extensive rain and snow, the lake rose several feet and BBSO was surrounded by water at the time construction was completed using makeshift barges in May 1970.There are an average of 1.7 days each year with highs of 90 °F (32 °C) or higher.Freezing temperatures have occurred in every month and occur on an average of 186 days each year, on average from September 24 to June 4.Big Bear Lake was inhabited by the indigenous Serrano Indians for over 2,000 years before it was explored by Benjamin Wilson and his party.Once populated by only the natives and the grizzly bears, from which the area received its name, the population of the Big Bear Valley grew rapidly during the Southern California Gold Rush from 1861 to 1912.Grizzly bears were not found in the region after 1908.and they are sometimes sighted in residential areas.
The coolest month is January, with a daily average temperature of 34.1 °F (1.2 °C).
The Big Bear Lake Oktoberfest also sports the highest Biergarten in the U. During the 1990s, the city became famous as a training spot for boxing champions.
Oscar de la Hoya, Mike Tyson, Fernando Vargas, Gennady Golovkin, and Shane Mosley are among the famous boxers who have trained at Big Bear.
BBSO, now operated by the New Jersey Institute of Technology, is still a major Big Bear Lake landmark connected to the north shore by a dirt and rock causeway.
Since 1970, Big Bear Lake has held its annual Oktoberfest. Big Bear Lake was incorporated as a city on November 28, 1980.