Peterson Park, nestled next to the 60 freeway, provides playgrounds, a baseball field, a skatepark and an iconic view of Diamond Bar. The trailhead for the unofficially named "Diamond Bar Sunset Vista Trail," which leads to the top of the hill beside Peterson Park, is somewhat hidden in the treeline along the park's pathway. However, the steep 0.2 mile climb provides a rewarding westward view and offers a perfect spot to watch sunsets over Diamond Bar.