Yosemite Mountain Sugar Pine Railroad opens Saturday, March 15 (Jenny Cars only) and then the steam train begins running on April 1. Well behaved small dogs who can ride on owners laps are allowed on the Jenny cars, along with their well-behaved owners, as space permits. The railroad has a museum and offers gold panning activities. Bring your lunch and take advantage of the tables in the shade of cedar, dogwood and ponderosa trees.