Mount Ruth is an 8,690-foot summit located within Mount Rainier National Park in Pierce County of Washington state. Part of the Cascade Range, Mount Ruth is situated between the Emmons Glacier and the Inter Glacier. Access is via the Glacier Basin Trail. The name of the peak honors Ruth Knapp, daughter of the prospector who built Knapp's Cabin in Glacieā¦Mount Ruth is an 8,690-foot summit located within Mount Rainier National Park in Pierce County of Washington state. Part of the Cascade Range, Mount Ruth is situated between the Emmons Glacier and the Inter Glacier. Access is via the Glacier Basin Trail. The name of the peak honors Ruth Knapp, daughter of the prospector who built Knapp's Cabin in Glacier Basin below the peak. Precipitation runoff from Mount Ruth drains into the White River.