Do you know of colleges with easy access to white water rafting?

Check out Colorado College and Arkansas River rafting.

https://www.coloradorafting.net/2011/11/colorado-whitewater-rafting-is-a-great-workout/
https://www.coloradorafting.net/river-trips/arkansas-river/#filter/49

The school’s outdoor education program includes a rafting track.
https://www.coloradocollege.edu/offices/outdooreducation/ahlberg-leadership-institute/whitewater-rafting-leader-track.html

CC is a small, selective liberal arts college with a ~16% admission rate.
Its unusual one-course-at-a-time block plan provides long weekends (“block breaks”) every 4 weeks.
This creates free time to enjoy outdoor adventures in the Colorado Rockies.

https://www.usnews.com/best-colleges/rankings/national-liberal-arts-colleges/innovative