"The lake" was somewhere that Marty McFly and Jennifer Parker were planning to camp out at before their adventures with Doc Brown, had only Marty possessed a vehicle like the Toyota 4X4 he saw downtown. When Marty changed the past, it affected the future and the 4X4 was his. When Marty and Jennifer left for 2015, his family assumed that they left for the lake. When Marty returned home after 1885, they thought he picked up his western wear at the lake. Whether Marty and Jennifer did eventually make it to the lake remains unrecorded.

While in 1885, Doc Brown may have been referring to the same lake to wait for it to freeze over in winter. Furthermore, Buford Tannen and his gang were sleeping next to a lake that could have been the same.

In 1986B, the lake was the location of a Math and Magic Competition that the Marty of that timeline attended.

Notes

Considering how Marty says "up to the lake", it is likely located in the Sierra Nevadas, or even north of Hill Valley.

Appearances

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