Create your ultimate best outdoor activities in the us tier list and rank everything from S tier to D tier. This best outdoor activities in the us ranking tool lets you compare, vote, and share your tier list with the community. Looking for the best best outdoor activities in the us? Use this tier list to settle the debate and see how your best outdoor activities in the us rankings stack up against other users on TierBuddy. Popular categories include outdoor-activities, national-parks, hiking, camping.