Spring angling at Henry Hagg Lake features ongoing trout stockings, with boat and shore anglers targeting rainbow trout using baits like PowerBait or worms, or slow trolling spinners and spoons in mid-depth areas. Early in the season, bass often hold in deeper water along ledges, humps, and drop offs, where finesse techniques like drop-shot rigs, jigs, or crankbaits prove effective for imitating prey like baitfish or crayfish. As conditions warm through spring, bass transition shallower into creek arms and coves for pre-spawn activity, targeting these areas with reaction baits like spinnerbaits, chatterbaits, jerkbaits, or swimbaits offer good opportunities for these fish throughout the season.

Hagg Lake is one of western Oregon's largest lakes and is a premier warmwater fishing destination. The lake is home to both the state record smallmouth bass and bullhead catfish.

Current reservoir levels can be found here. Maintained and operated by Washington County, the park features numerous picnic areas, two boat launching facilities, more than 15 miles of hiking trails, and observation decks for wildlife and bird watching. The lake and lake park are currently open, although users are encouraged to check the Hagg Lake Park website, as conditions can change.