Colorado River

Worth it if you're after proper adventure—over 100,000 people can't be wrong, and the 4.8 rating is genuinely solid. The free entry means you're only paying for what you actually do (rafting, helicopter tours, whatever), so you can dip in cheaply or go full throttle; book midweek or shoulder season to dodge the obvious summer crush.

Written by us from the live data above — never copied from anywhere. Ratings and counts update from Viator.