When a particular watershed / river is
- On or close to the road system; particularly if near Los Anchorage
- Home to a strong seasonal run of a popular fish (i.e. either King, Red, or Silver salmon)
- Near to infrastructure (i.e. motels, restaurants, guide services, etc)
...then there is the perfect mix for combat fishing. The Kenai (we won't look too closely at the King salmon situation) fits the bill perfectly as does the Russian River where it comes near the road system.
The Kenai, particularly the upper part, is a great trout fishing location later in the year (up until a week or two before freezeup)....so I'll go there every so often for trout in September; it's just not enjoyable to fight for a spot on the bank for the dubious privilege of casting a line in an narrow 2'-wide slot and having to wear safety glasses while chasing salmon ...i.e. "combat fishing"