This area is part of the Willamette watershed, one of three major watersheds in southwest Portland. Stephens Creek, a perennial creek with an average depth of 6.5 inches, bisects the park and flows in a northwest to southeast direction. Portions of the creek above and below the site are culverted as it flows through urbanized southwest Portland. Custer Creek empties into the park from a culvert located just east of the junction of SW Capital Hill Road and SW 17th Avenue. The confluence of Custer and Stephens Creeks is located within the park. The park is valued as neighborhood open space and as a refuge for wildlife and native plants.