Are there any parts of Alaska that are still unexplored?

Answer 1

Certainly. While it would be hard to rule out Alaskan Natives having wandered through 1000s of years ago, if you go high enough to require technical climbing gear, you could be sure that no human has ever been there. Sure, people have summited most of the taller peaks in the state, but pick a random spot on a random ridge, and no one will ever have walked there.

The other place to go if really want to be the first one there would be the new ground where volcanos have erupted. We have one or two eruptions most every year (mostly in the Aleutians). Mt Augustine (visible from Homer, Alaska) was a recent and fairly accessible eruption.

But the uninhabited Aleutian Islands, the uplands of the inhabited ones, most all of the Alaskan Peninsula, Western Alaska, the Brook's Range and the North Slope are all areas that now and in the distant past have had little human visitation. I'm sure I've put my feet down on ground no one else ever has. Just get off the trail and tramp around a bit.

Or go to the top of any glacier - that's all new - since the last winter's snowfall. Also the bottom of any glacier - that ice hasn't seen daylight for thousands of years.

If you mean, Are there undiscovered mountains and rivers? Nothing big since about 1900 (those gold prospectors got most everywhere). Nothing medium since flying started up here in the 1930's. Nothing at all now between aerial photography adn satelite imagery. i.e. Google Earth.

Lots of undiscovered things though - new archealogical sites, new dinosaur species fossils, new mineral deposits, and the ocassional new critters (mostly in the ocean) are discovered each year up here.

Answer 2

Yes, many. Mostly in the uninhabited northwestern part of the state.