Local cyclist and former Smartwool executive Mark Satkiewicz died Saturday. He’s pictured with his daughters, Olivia and Mia, and wife, Amy.

STEAMBOAT SPRINGS — Mark Satkiewicz, an avid cyclist, co-founder of the SBT GRVL mountain bike race and former president of Smartwool, died on Saturday, according to the Routt County Coroner’s Office. He was 51.

Satkiewicz is survived by his wife, Amy, and two daughters, Olivia and Mia.

“He was our rock,” Amy said Monday. “We were everything to him, and we always felt that. He always made us feel safe and secure.”

A Steamboat Springs resident and dedicated community member, Satkiewicz was cycling Saturday afternoon on Routt County Road 82 near mile marker 31 in North Routt when he suffered a heart-related incident, according to Routt County Coroner Rob Ryg. He died at the scene.

Satkiewicz had suffered from heart issues in the past, Ryg noted, but a final cause of death has not yet been determined.

He was born and raised in Glenview, Illinois, and received his undergraduate degree from Miami University in Oxford, Ohio, and his graduate degree at Loyola University Chicago.

In 2006, Satkiewicz joined Smartwool as vice president of sales. He was promoted to president of the formerly Steamboat-based company in 2009. Before that, he spent a decade with Nike, Inc. Satkiewicz left Smartwool in 2016 to take the role as general manager of the Americas at Toms Shoes in Los Angeles. His family then returned to Steamboat, where he co-founded SBT GRVL. The inaugural race was held on Aug. 18, 2019.