Green Drakes in Town

Today i fished a brand new stretch of water, and it is about a half mile from my door. Kinda sad that it took me this long to fish this water. There is about a mile and a half of public water and most of the year it is way to low to fish, but with our big run-off this year it is at perfect levels and the fishing was great. Green Drakes were popping off everywhere and there were some fish rising. So I rigged up and started my venture into the new waters. I hooked into a few smaller fish in the 6-10 inch range, and was pretty happy because I didn't know what to really expect in this water. Then I lost a fish that felt pretty big and got pretty excited. On the next bend there was a big slick slow water section and I just casted close to the far bank and what ended up eating my fly was a big, wild 18.5 inch brown. It ripped across the current and fought hard and I ended up bringing it to net with a mix of surprise that this big fish was in this little stream and just pure happiness. As I walked back to my house from the stream I knew I would be back there soon, I wonder if there are even bigger trout in there?