This 1,920-acre site and its surrounding landscape are characterized by steep, rugged terrain and narrow canyons that terminate at the edge of the Columbia river.  It contains one of the largest known populations of Thompson's clover, a state Threatened plant, and a population of longsepal globemallow, a state Sensitive plant. The area, which also contains grasslands and scattered ponderosa pine and Douglas-fir, is susceptible to and has evolved with frequent natural fires.  Longsepal globemallow, an apparently fire- dependent species, drastically increased in numbers following the most recent fire, in 1988.  (Chelan County)