How To Clean Fresh-Caught Trout:
First you need to cut the head off just before the Pectoral fin (this fin can be nipped off or left on). This is an optional step, as some people want the head left on when cooking.
Hold fish with belly facing up. Using your fillet knife, cut from the anal hole forward towards where the head was or still is.
After pulling out the entrails, take an old tooth brush and clean the blood vein that runs along the spine. If that is not cleaned out it, will effect the taste.
Rinse the trout thoroughly (inside and out) and prepare to cook as you wish.
NOTE: If you like to eat the fish skin, make sure you remove all the fish scales before cooking. With the trout held firmly by the tail, scrape very firmly from the tail to the gills several times on both sides with a sharp knife. I, personally, like to have my trout scaled before cooking.