Yosemite Valley Railroad Yosemite Valley Railroad The Yosemite Valley Railroad (YVRR) was a short-line railroad operating from 1907 to 1945 in the state of California, mostly following the Merced River from Merced to Yosemite National Park, carrying a mixture of passenger and freight traffic. Contrary to the name of the railroad, rail service did not extend to Yosemite Valley itself, but rather ended at the park boundary as the construction of railroads is prohibited in the National Parks. Passengers would disembark at the park boundary in El Portal, CA and take a stage coach, and starting in 1913 a motor coach, to Yosemite
Yosemite National Park documented more than 130 non-native plant species within park boundaries. These non-native plants were introduced into Yosemite following the migration of early Euro-American settlers in the late 1850s. Natural and human-caused disturbances, such as wildland fires and construction activities, have contributed to a rapid increase in the spread of non-native plants. A number of these species aggressively invade and displace the native plant communities, resulting in impacts on the park's resources. Non-native plants can bring about significant changes in park ecosystems by altering the native plant communities and the processes that support them. Some non-native species may cause an increase