First purpose caught sport fish was while we were visiting Yellowstone back in the early 60's. I was 12 or so and had caught common fish like carp, sunfish, bluegill, etc. My dad had given me a fiberglass pole and Mitchell spinning reel for my birthday, I was itching to put it to use on trout. It came with an assortment of Mepps spinners in a small box. We were staying in a cabin on the trip and were too busy seeing all the wonders, we did spend some time driving around the area and while on one our drives we crossed the Henry's Fork of the Snake River. We stopped for some sandwiches for lunch and I begged to be let loose to catch something. Away I ran, selected a nice bucktail spinner, tied it on and with what little knowledge I had read about via Outdoors Sportsman, Field and Stream, etc. Cast out upstream towards some rocks with eddys behind them. I got better by and by and saw this one eddy that looked nice and deep, cast upstream and let the spinner sink, slowly cranking past the rock and BAM, I get a solid bite and begin fighting a decent fish in good strong water, I managed to get it to shore without a net and held it up for a good look at my first sport fish...it was a Dolly Varden a little over a foot long, they have since renamed them Bull Trout. We had no provision to cook the fish so I did the best I could and returned it, heart broke that noone in the family had witnessed my glory. I fished a bit more to no luck and returned to the picnic area, told my story and it must have been how serious and excited it was that they all believed me, including my little brother.