Fallen Rock State Preserve is part of the Iowa River Greenbelt and features scenic forested bluffland and 300-million-year-old sandstone cliffs. A majority of the preserve is forested, along with a few open meadows near the river. There are more than 300 plant species here, including a wide range of scenic wildflowers. March and April welcome blooms like Virginia bluebells and hepatica while May brings fiddleheads of fern. In the summer, forbs like Jacob's ladder and purple joe-pye-weed. The last flowers in the fall include blue wood aster and zigzag goldenrod. The north-facing wooded slopes are occupied by red oak with wahoo and leatherwood in the understory. The floodplain contains American elm, black maple and black walnut, and some mature white pines grow on the cliffs. Moss also flourishes here.Several different species of raptors call the preserve home, as the Iowa River is an important flyway. Keep an eye out for species like broad-winged hawks and bald eagles during their migrations. The preserve also has 61 bird species including the scarlet tanager and least flycatcher. Barred owl and wild turkey can also be spotted. Other wildlife includes cricket frogs, beavers, and spiny softshell turtles. Hunting is permitted.