A 20-year-old Kansas University student remains in serious condition in a Denver hospital after a Wednesday skiing accident in Winter Park, Colo.

Ellie Cizek, of St. Paul, Minn., was skiing in the Parsenn Bowl area of the Forget-Me-Not trail at Winter Park Resort when she struck a tree about 1:30 p.m. CST Wednesday, according to a Winter Park spokesman. She was transported by helicopter to Denver Health Medical Center after ski patrol responders rushed her to the resort’s medical clinic immediately following the accident. Resort staff reported Cizek was not wearing a helmet at the time of the accident.

Friends and family members did not respond to emails and Facebook messages Friday. A spokeswoman for the hospital in Denver said Cizek is listed in serious condition.

On Wednesday and Thursday, members of Cizek’s Kappa Kappa Gamma sorority chapter took to Twitter to express their hopes for her recovery.

“To one of our precious girls, @ellecizek keeping our thoughts and prayers stronger than ever to get you safe and well,” read one message tweeted by the KU chapter’s account @KUkappa. “We love you El, fight!”

The ski resort, located about 50 miles northwest of Denver in the Rocky Mountains, issued a statement about the accident Friday.

“Winter Park Resort extends its deepest sympathies to the patient as well as her family and friends affected by this tragic accident,” it read in part.