Joshua Tree Poster Arizona Support the Mississippi River by

Support the Mississippi River by making a donation at parkconnection

Roosevelt dedicated the dam on March 22

America’s first transcontinental railroad was completed in 1869

and in 1937 Shenandoah National Park became the first national park to reach one million annual visitation

Joshua Tree Poster Arizona Support the Mississippi River byDescription 14" x 22" poster Interpretive Copy The Joshua Tree (Yucca brevifolia) Most Joshua trees grow wild in the Mojave Desert. Their southernmost strandhere in Joshua Tree National Park marks the transition from Mojave Desert to the Colorado Desert (a part of a larger Sonoran Desert).