Elk Rock State Park is located in the state of Iowa and is a popular destination for outdoor enthusiasts. The park offers a variety of activities such as hiking, fishing, boating, swimming, and camping. The park boasts scenic views of the Des Moines River and a unique rock formation known as "Elk Rock."

One of the main attractions of the park is the Elk Rock itself, a massive rock formation that towers over the Des Moines River. Visitors can hike to the top of the rock for a stunning panoramic view of the surrounding landscape. The park also has several trails for hiking, biking, and horseback riding, including the 12-mile Sac & Fox Trail.

Other points of interest in the park include the Elk Rock State Park Lodge, which was built in the 1930s by the Civilian Conservation Corps and the park's campground, which has over 50 campsites and several cabins available for rental.

In terms of interesting facts, Elk Rock State Park was originally established in 1935 as part of a larger Iowa State Park system. It was named after a nearby town that was flooded by the construction of the Red Rock Dam in the 1960s. The park's location along the Des Moines River also makes it a popular spot for fishing, with several species of fish such as catfish, bass, and walleye found in the river.

The best time of year to visit Elk Rock State Park is in the spring or fall when the weather is mild and the foliage is at its peak. However, the park is open year-round and offers different activities depending on the season. In the summer, visitors can enjoy swimming and boating on the river, while in the winter, the park is a popular spot for ice fishing and cross-country skiing.