No Andreen Creek-specific exception appears in the Region 4 regulations synopsis, so default Region 4 rules and in-season notices apply. Confirm the current Region 4 synopsis before fishing, and keep in mind that fish presence here itself is unconfirmed.

The creek sits at 50.54576, -116.19174, within the wider horsethief creek tributary group that also includes Gopher Creek, Haultain Creek, Stockdale, Bruce, Law, Farnham, McDonald, Red Line, Paulding and Fan creeks. It drains toward the columbia river by way of Horsethief Creek. No stream-order, length or channel-geometry figures are available for this reach in the checked data, and it isn't confirmed whether it carries summer surface flow, so its day-to-day character is still an open question.

With no confirmed fish records, Andreen Creek is a scouting water rather than somewhere to plan a trip around. If you do explore it, and only once legal access is confirmed, keep it to light small-stream gear on the chance a resident population turns up: an adams or stimulator on top, an elk hair caddis for any surface activity, and a hares ear nymph or prince nymph worked underneath. Likely forage, if fishable habitat exists, follows the regional small-stream menu of caddisflies, mayflies and stoneflies, with summer terrestrials adding hoppers and ants where the water is fishable.

There is no confirmed public access route, trailhead or put-in on record for Andreen Creek. The wider Horsethief Creek country mixes Crown and private land, so confirm legal access and current land status before making the trip.