It's every where. I use a 4 oz. titanium stove I made myself (photos). Fuel is sticks about the diameter of a pencil. The wood is only superficially wet. If it's raining, I strip the wet bark off the first handful with my knife to start the fire. Once it's going just I throw on the wet wood. It burns just fine. Don't use any part of a twig that has been in direct contact with the ground. It gets damp throughout. I put 15 drops of charcoal lighter on a wad of fiberglass in the bottom of my stove (it has a baffled air intake at the bottom), light it and throw on the first handful. Then I set on the pot.
People in this forum have told me that in the Pacific Northwest the wood is soaked through. I've never hiked there, but I've hiked in other temperate rain forest and never failed to get a good fire going in my stove using the above method. I think the higher temperatures inside the stove as opposed to those in an open campfire may account for that.
oops! Not sure why, but the first picture is the steel prototype (10 oz), not the titanium version. Packed stove & pot in second photo is titanium.