I believe the park is actually an extension of greenspace connecting Christy Park with the River Des Peres Park. This is corroborated by the Joe Leisure park signs located at Christy and Gravois and Christy and Holly Hills...
The Boulevard Heights Neighborhood
The neighborhood has some areas that are typical of South City, a la Holly Hills, Princeton Heights, Southampton, etc. Other parts of the neighborhood are more suburban with cul-de-sacs and no sidewalks, etc. Overall, the edge of the city that gives you a distinct feel of the Southside, with a taste of what South County becomes.