Complex sentence: Within the national forest boundarys can be found the arid Uncompahgre Plateau and the northern portion of the San Juan Mountains and three alpine wilderness areas, Uncompahgre (formally the Big Blue), Sneffels and Lizard Head.
Split into simpler sentences: Within the national forest boundarys can be found the arid Uncompahgre Plateau and the northern portion of the San Juan Mountains. The Uncompahgre National Forest contains three alpine wilderness areas, Uncompahgre (formally the Big Blue), Sneffels and Lizard Head.