Callao is a small town in Missouri with a humid subtropical climate characterized by hot summers and cool winters. The town is located near the Salt River and has a few small ponds and creeks. The water in these bodies is safe for fishing and swimming. Outdoor recreation opportunities in Callao include hunting, fishing, hiking, and camping. Deer and turkey hunting are popular in the area, and Callao is home to several wildlife conservation areas. The town also has a few small parks with playgrounds and picnic areas. Visitors can enjoy hiking and camping at Mark Twain National Forest, which is located about an hour's drive from Callao.