Talkeetna is a comparatively tiny village that thrives on tourism during the summer seasons, but many of the outlying areas are also private property. Supposing you intend to hike on its public lands, be aware that the vegetation in Alaska is enough to trip a horse, much less a bipedal intruder. Areas not permanently trampled by the local inhabitants are difficult to penetrate, so be aware that wilderness navigation skills and plentiful time will be required in traversing any great stretches in the area.
When I was a kid they didn't have that walkway on the Railroad Bridge just up the tracks from Downtown Talkeetna. It's illegal now to climb around on the bridge, but that is what we used to do for fun. My brother's and I changed our mind after our cousin in Anchorage was run over by the train. Though he lived he is now in a wheel chair. The train is very dangerous.
When I was a kid one winter a couple of calves whose mother was killed by the train hung out in our yard. They begged for food, and we fed them so they stayed. Both died though, one got hit by the train and the other had to be put down when it developed an inner-ear problem and started walking in circles. There was no denying they were wild animals. One nearly attacked my mother. She swatted it on the nose and it left her alone. I wouldn't suggest trying that at home, moose are very unpredictable.
weather can be primarily rainy, but we have found that the best weather here (and we have been here for 8 years now) is during mid July. The temps in the interior can reach upper 90's, Anchorage bowl- mid 80's, Kenai peninsula- mid 80's. In fact more years than not this has been the case. We spend the beginning of every july in Talkeetna, always hot and dusty, mid july in Soldotna, again, hot and dusty. Back home to Eagle River at the end of July and it usually starts raining sometime in the last week.