It depends on your interests and how much time you want to spend exploring the park. For a comprehensive experience, we recommend spending 2-3 days in Cuyahoga Valley National Park. This will give you enough time to enjoy the park's main attractions, such as hiking the trails, visiting the waterfalls (including Brandywine Falls), exploring the Ledges Trail, taking a scenic train ride on the Cuyahoga Valley Scenic Railroad, and visiting the Canal Exploration Center. Additionally, you can explore the park's diverse flora and fauna, as well as enjoy activities like biking, birdwatching, and stargazing. If you have limited time, a one-day visit will still allow you to see some of the park's highlights, but a longer stay will provide a more immersive experience.