You’ve probably heard about Dog Mountain. There’s a good chance you’ve hiked Dog Mountain. But, have you ever run Dog Mountain? The Ruff is your chance to challenge your legs and lungs as you climb 3 miles (a 3000 foot elevation gain) and then run down the trail, quads burning, for 4 miles. And don’t forget the scenery along the way. You’ll have views of the Columbia River, Mt. Hood, and Mt. St. Helens as…