Once in Oregon, McCarver settled along the
Columbia River in what is now
Portland, Oregon. In 1845, he was again elected to the
Provisional Legislature of Oregon from
Tuality District and was selected as the
speaker of the then renamed House of Representatives, the first to hold that position. McCarver left Oregon for the
California Gold Rush in August 1848, but left his family in Oregon City to hold the land claim. He was also elected to serve at the
Constitutional Convention of 1849 that was held in
Monterey, as one of eight people representing the Sacramento district. Also in 1849, along with some others, he purchased three passenger ships, including the
Ocean Bird. McCarver also participated in a gold rush in
Idaho in 1862, setting up a company in what became
Idaho City. On April 1, 1868, McCarver arrived at
Commencement Bay, a likely railroad terminus on
Puget Sound due to its proximity to
Snoqualmie Pass, and then purchased the land of
Job Carr. He continued buying up available land along Commencement Bay in anticipation of the railroad. Anthony Carr, Job's son, had already filed a plat for "Tacoma" on November 30, 1869. McCarver chose to call his neighboring plat "Tacoma City" when he filed his plat map on December 3, 1869. ==Death and legacy==