<p>I was a bio major and worked the summer of my junior year in Yosemite. I wasn’t with the Park Service, but worked for the concessionaire at the time, Curry Company. My job was making beds in the tent cabins, but I visited the park headquarters and asked if I could volunteer there. They gave me a project mapping the cougar sightings in the park over the past 50 years (most sightings were near the bar at the Ahwahnee). They had a stable in the valley, and experienced horse people were in demand to care for the horses and lead trail rides. Working in a national park is great way to find out if wildlife biology or park service is your cup of tea. Not sure who is running the stables now, but the best time to apply is toward the end of summer when the seasonal college kids are heading back to school.</p>