Umtanum Campsite 6 is a developed and reservable campsite located in the Upper Yakima watershed of Washington. Visitors can expect to be surrounded by stunning views of the surrounding mountains and river. The nearby Umtanum Ridge Crest Trail offers hikers a scenic and challenging experience. The campground amenities include picnic tables, fire rings, and vault toilets. It's interesting to note that the area holds significant cultural and historical value to the Yakama Nation, whose ancestors have lived in the region for thousands of years.

The best time to visit Umtanum Campsite 6 is during the summer months when the average temperature is around 80 degrees Fahrenheit. However, visitors should be aware that temperatures can range from hot during the day to chilly at night, so it's important to pack accordingly. Reservations can be made online through the Washington State Parks website.

Sources:
- https://www.wta.org/go-hiking/hikes/umtanum-ridge-crest-trail
- https://parks.state.wa.us/551/Umtanum-Campground
- https://www.yakamanation-nsn.gov/
- https://www.weather-us.com/en/washington-usa-climate