In Vince's defense, there's almost nowhere in the park that someone hasn't been, and most will have a camera, so just going to a "scenic" place and taking photos isn't going to make them sell.
Marketing and photography are two entirely different things; if you really want to make money at it, find a market first, then shoot whatever the market demands. It will take all the enjoyment out of photography most likely, but that's pretty much the way it works.
I'm guessing you enjoy photography, and wouldn't mind making money at it while you have fun...a lot of people feel exactly that way, but it's not as simple as going to some scenic place, because there are a zillion other photographers out there also.
If you "know" somebody with a gallery, or coffee shop, or store that will display your photos, you can sometimes sell some that way...but again, a photo of some backcountry scenic lake isn't going to outsell a pic of Half Dome, so why worry about out of the way places?
If the above is true, I'd suggest looking through a couple of hike books to find some hikes or locations that sound like you'd really enjoy them, in line with the distance you're willing to go. Then go, and take your camera. Go early, or stay late, keep your "photo-eye" open, take your time, and look for things unique, not necessarily just "pretty scenes". Most folks who enjoy photography, put some effort into their own unique shots, and stick with it over time, will sell some photos here and there...but frankly, it doesn't matter because they shoot for the love of photography, not for the big bucks.
Most any place will do for getting good photos, the marketing is up to you.
Gary
Yosemite Photo Galleries: http://www.pbase.com/roberthouse/yo