Complex sentence: Mountain bikers and hikers can also follow the Chimney Gulch trail, a difficult, narrow "single track" hiking trail that crisscrosses the Lariat Loop road twice on its way to the summit.
Split into simpler sentences: Mountain bikers and hikers can also follow the Chimney Gulch trail. Considered a difficult ascent, the "single track" or narrow hiking trail crisscrosses the Lariat Loop road twice on its way to the summit.