This tour visits a 2000 year old basalt rock flow tunnel, formed from an eruption of Mount Saint Helens. A lava tube, you'll walk down this cavern with flashlights or headlamps. You'll also visit Trail of Two Forests, with remnants of 2000 year old tree cement tree stumps (from the lava flow). Both a fascinating. 10 hour day, lunch and water included.
This will probably be a private tour, but you may go with another couple. Five people maximum allowed in our comfortable SUV, unless you all know each other, then we can fit 6.Departing from your Seattle or airport hotel, B&B, or pier, you'll travel South to the first stop, an interpretive center from the 1980's eruption. Here you see the mountain in the distance and inside the interpretive center, get a good visual of the before and after May 18, 1980 blast. You'll see a short film showing actual footage of the 1980 eruption. Then on to the Ape Cave, named after the Boy Scout troop that found the opening to the cave. A fascinating experience, the walls, ceiling, and floor of the cave have incredible markings from the gas that flowed through here 2000 years ago.