Dictionary.com
Thesaurus.com

fun run

British  

noun

  1. a long run or part-marathon run for exercise and pleasure, often by large numbers of people

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

An estimated one million people now consider themselves to be runners, taking part in new events from fun runs to marathons.

From BBC

But yeah, I have some really fun runs this year.

From Salon

“I wanted to go to a place where I could make a fun run in March,” Knecht said.

From Seattle Times

Run & Walk with Pride: Join the Seattle Frontrunners for this fun run and walk event which serves as its annual fundraiser to help support local LGBTQ+ nonprofit organizations.

From Seattle Times

Baker may host an unofficial “fun run” type of event on the course next weekend, but Howat made no promises.

From Seattle Times