You’re over drilling ice holes. You’ve tied enough flies to last a season. Your tackle has never been more organized. Each drop of melting snow dripping from the gutter gets you more amped for your triumphant return to open-water fishing on the river or lake. Problem is, depending on where you live, that open water is likely to be high, cold, or dirty—or all three. Runoff, thawing ice, and early-spring rains can make any water extremely difficult to fish, but they can also offer big advantages. In fact, these pros would wager that if you can just tough it out, that bone-chilling chocolate milk could produce your biggest pike, bass, trout, walleyes, and crappies of the season. Here are their strategies to find and catch March monsters.