An obelisk monument marks the spot at Champoeg where the historic 1843 vote by trappers and farmers of the area occurred. It signified the creation of a government and the Oregon provisional territory of the United States. The small plot of land first designated as a park in 1901 to commemorate this site surrounds the monument and was the beginning of Champoeg State Park. The Pioneer Memorial Building and attached Pavilion were built to house the annual celebrations of this historic event in the early 1900s. Also, look for the large Provisional Government Park Cottonwood designated an Oregon Heritage Tree in 2009.

The Pavilion is available to rent for parties or other events.