It is free and I saw many dogs on the trail.

The answer on how long it is completely depends on your own fitness level. I have seen locals jog by me and do it as a several hour run. I tend to take it slower than even my my own fitness level would allow, simply because I love looking around and soaking in the beautiful scenery, smells, and sounds. I can’t remember specifically, but I think generally it is about a five hour trip for me. I do remember taking my twin daughters on this trail when they were about five, and they did not make it past the point where the town disappears. :) I would say you could certainly start by walking up with them a ways, and see how it goes. My hat is off to you if you can get them all the way to the falls!

Bear Creek Falls is in Telluride. Ouray is on the other side of the northern facing mountain with Imogene Pass at the top, but the Bear Creek Falls trail leaves from the south side of Telluride. You leave from the town of Telluride and hike up to the south. Definitely ask anybody in town, as it is a popular trail, and they can point you to the right trail head. Enjoy!

I’m a summer visitor I know nothing about ski season

There are parking places along the street about a block away and major parking lot at beginning of town about a 10 minute walk away.

I think you could if you have spikes for the bottom of your shoes. Shouldn't be a issue.

2 miles up alright. Like straight up. In snow and ice it would be a bear. I wouldn't do it.

No way. It's a walking trail only. Not hard. There are plenty of ate tour companies you can contact