[1] The collection, founded in 1979 by retired building contractor Frank Mason,[2] includes pre-1916 motorcycles, photographs and memorabilia.

[1] Mason and his wife Barbara bought and renovated the historic 1889 Washington Hotel building in Chehalis after it burned in 1997, and moved the collection there.

[3] The museum moved its collection in 2021 to the Marketplace Square building, half a block south from the hotel.

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