Ancient Lake


Day Hike - Ancient & Dusty Lakes

See and learn about one of the 7 geological wonders of Washington, the massive coulees and ripped up terrain formed by the dozens of 200 foot tall ice age floods. You must email photographic proof of vaccination to join this hike (you can block out your birthday).

COVID-19: Learn about our most up-to-date guidance for participants and leaders on our COVID-19 Response page. All participants and leaders must agree to the COVID-19 Code of Conduct before participating in this Mountaineers activity.
  • Strenuous
  • Challenging
  • Mileage: 13.5 mi
  • Elevation Gain: 2,000 ft
  • High Point Elevation: 1,400 ft
  • Pace: 2.25 MPH average moving speed

8:30 Quincy Lakes South Access Gate (discover pass required, no privy)    If you want to carpool, 6:15 at Preston Park and Ride, exit 22 

There will be 5, 2-minute talks at illustrative points on the route that will talk about the ice age floods. Information will also be distributed before the hike.

Here is a photo album from close to the same time last year   

Here is the route which starts above the coulees, tours the potholes lakes, drops into a coulee, and then drops all of the way to the Columbia River


Ancient Lake

Required Equipment

Required Equipment

The Ten Essentials

  • Navigation
  • Headlamp
  • Sun protection
  • First aid
  • Knife
  • Fire
  • Shelter
  • Extra food
  • Extra water
  • Extra clothes
Trip Reports