 Most park visitors stay just for the day , and only visit locations within Yosemite Valley that are easily accessible by automobile . There is a US $ 25 @-@ 30 per automobile user fee to enter the park , depending on the season . Traffic congestion in the valley is a serious problem during peak season , in summer . A free shuttle bus system operates year @-@ round in the valley , and park rangers encourage people to use this system since parking within the valley during the summer is often nearly impossible to find . 
