We're hitting Yellowstone the first week in June.

I would like to take my three year old daughter on short hike / fishing excursion. She has about a half hour attention span, so we need numbers of small fish, climb some small rocks, turn a few over to check out the bugs. I stumbled across few pretty creeks that fit this description perfectly when we were in Rocky Mtn Nat'l park a few years ago (Fall River, St. Vrain). Some nice trails right alongside the streams that would provide perfect access for kids

I apologize for asking outright. If it was just me, I'd do the research and exploration on my own. I'll hit a couple of fly shops while I'm out there as well (we'll probably be coming in through West Yellowstone). We're staying at the Canyon Lodge.

Thanks in advance.