St. Marie Park is a day-use only facility on the Arkansas River near Pool 3 Lock and Dam, offering a boat ramp, fishing dock, courtesy dock, and two reservable group picnic shelters (up to 75 people each).

The park provides drinking water, grills, restrooms, and a playground, with a $5 daily vehicle fee; note that it operates seasonally (typically closed December-February, reopening March 1st) and the gate is frequently locked, so call ahead at (870) 536-2531 before visiting.