To celebrate the beginning of the summer season, visitors can enjoy nature hikes, hayrack rides, cowboy cookouts, pancake feeds and other special events. This is also the weekend for the park’s infamous buffalo chip throwing contest. The park hosts a free fishing derby, awarding prizes for anglers in each age group. Info: (605) 255-4515, www.custerstatepark.com.

This weekend is also Open House and Free Fishing weekend. During the weekend, no park entrance fees are charged and fishing licenses are not required. Camping fees and fishing regulations still apply.