Black Crappie - Good: Try trolling for suspended crappies over rock piles using small crankbaits. Jigging around submerged structure can also be productive.
Channel Catfish - Fair: Try nightcrawlers or cut bait.
The current lake level is 904.61 msl with 904 msl being recreation pool. Lake Rathbun has zebra mussels so make sure to properly drain, clean and dry equipment before transporting to another waterbody.
Walleye - Fair: Troll crankbaits or nightcrawler rigs over rock piles and near lake depth changes such as the old river channel.
Wiper (Hybrid Striped Bass) - Good: Try minnows and jigs over rock piles or trolling crankbaits.
Source: Iowa DNR