Hidden Lake Gardens is a 755 acre botanical garden and arboretum in the scenic Irish Hills of southeast Michigan operated by Michigan State University.  Featured collections include the Benedict Hosta Hillside, the Harper Collection of Dwarf and Rare Conifers, bonsai, conservatory with tropical, arid and temperate houses, arboretum of flowering trees and shrubs, perennial and annual gardens.  The Hosta Hillside features a significant collection of hosta donated and planted by the Michigan Hosta Society as well as the Michigan Hosta Hybridizers gardens planted in 2007.  More than 500 different cultivars are attractively arranged on a shaded hillside next to Hidden Lake.  A cascading stream meanders through the garden and spills into a dark reflecting pool below.  Dedicated as the Ralph H. (Herb) and Dorothy Benedict Hosta Hillside, this is an official display gardens of the American Hosta Society.  There are natural areas accessed by hiking, walking and biking trails.  A favorite winter activity on these trails is cross country skiing.