11-day traverse of Olympic National Park. - Monday, September 11 through Thursday, September 21 - Fitness level: High - Technical level: Medium The group will start in the northwest (at Sol Duc) and finish in the southeast (at Staircase), and resupply around Day 4 when crossing the Elwah. Mid-September is an ideal window for this trip: no bugs or crowds, fall colors in the alpine, and comfortable daytime and nighttime temperatures.