Even in San Francisco, a city considered hilly, McLaren Park stands out with some of the hilliest terrain in the city. Only 19% of its area consists of slopes of 0-10% grade, considered easily buildable. Slopes of 10-25% grade occupy half its area, and slopes over 25% grade occupy the remaining area (more than one-third of the total area). The original 1926 proposed park of had approximately 40% of its area with gentle slopes.
