While teaching students to write their BIG IDEA essays, I shared lots of essays written in the Washington Post newspaper. Every Thursday in the KidsPost, Fred Bowen writes a sports essay. Link to Fred Bowen sports-related essays.
The December UVA Alumni Magazine pringted some of the Class of 2015's college essays. They also list at the end of the article, tips for writing a strong college essay. This is another good mentor essay resource!