Pickerel Lake State Park is a beautiful park located in the northeastern region of South Dakota. The park is surrounded by a pristine forest and features a stunning lake that is perfect for fishing and boating. One of the main attractions of the park is its unique geology. The park is home to a rare natural phenomenon known as "Pickerel Lake Blue Clay," which is believed to have formed over 1.5 billion years ago. Visitors can also enjoy a variety of recreational activities like hiking, camping, picnicking, and swimming. There are several trails throughout the park that offer scenic views of the lake and surrounding forest. The park also has a historic log cabin that was built in the 1930s by the Civilian Conservation Corps. The best time to visit Pickerel Lake State Park is during the summer months when the weather is warm and sunny. Visitors can enjoy all the park's amenities and take advantage of the beautiful lake. However, the fall months are also a great time to visit as the leaves change colors, making for a beautiful and picturesque landscape. Overall, Pickerel Lake State Park is a must-visit destination in South Dakota for anyone who loves nature, outdoor activities, and exploring unique geological features.