Complex sentence: It also features hiking trails and views of the surrounding desert landscape; three of the four desert ecosystems found in the U.S.--the Mojave Desert, the Great Basin Desert, and the Sonoran Desert--meet in Lake Mead NRA.
Split into simpler sentences: It also features hiking trails and views of the surrounding desert landscape. Three of the four desert ecosystems found in the United States--the Mojave Desert, the Great Basin Desert, and the Sonoran Desert--meet in Lake Mead NRA.