Complex sentence: Kennedy Meadows is a major stopping and resupply point for northbound thru-hikers attempting the Pacific Crest Trail as it marks the southern end of the Sierra Nevada Mountains and the entry point into the South Sierra Wilderness.
Split into simpler sentences: Kennedy Meadows is a major stopping and resupply point for northbound thru-hikers attempting the Pacific Crest Trail. It marks the southern end of the Sierra Nevada Mountains and the entry point into the South Sierra Wilderness.