Rocky Mountain National Park

Others have talked about climbing Long's Peak-it's very tough, particularly for someone not acclimitized. There will also be snow on the gnarliest part of the trail (through the keyhole.) And this can be spooky. Not a good first fourteener to climb. However, it's not written anywhere you have to go to the top. It's a nice hike to just above treeline-and from there, there's a lovely view of "The Diamond." I doubt there will be any snow on that portion of the trail in mid june. A little further up is the Boulder Field-and the Keyhole. Likely will be snow that high. But if it's too deep, just turn around. The trip up the trail from the trailhead (8500 feet elevation or so) to timberline (11,000 feetish) is probably 3 or 4 miles-mostly through pine forest. It will smell wonderful. On a June weekday, it will be nice, and relatively uncrowded. If you aren't worried about getting to the top-you can start walking at 8:00 AM-instead of 4:00 AM. The view of the diamond from just below the Boulderfield is great. I have an 8 x 10 picture from that spot on my office wall that I took 30 years ago.