Amy Finn jokes Sunday with Scott Woodcock at the starting line of the 100-mile ride in the Dempsey Challenge. Andree Kehn/Sun Journal

Mary Dempsey, center, founding member of the Dempsey Center and sister of Patrick Dempsey, welcome cyclists Sunday to the third and final day of the Dempsey Challenge. Andree Kehn/Sun Journal

Susie “Q” Morton, a survivor with stage 4 breast cancer from Woodstock, Illinois, is excited Sunday to ride in the Dempsey Challenge in Lewiston. Andree Kehn/Sun Journal

Beth Rhinelander, left, of Oakland and Shara Marquis of Waterville don Patrick Dempsey paper masks Sunday as they cheer for riders in the Dempsey Challenge. Andree Kehn/Sun Journal

Levi Daniels awaits the start of his ride Sunday on the third day of the Dempsey Challenge in Lewiston. At 4 years old, Daniels is the youngest rider participating in the challenge this year. Andree Kehn/Sun Journal

Cyclists start their ride Sunday as a hot air balloon floats overhead on the third day of the Dempsey Challenge in Lewiston. Andree Kehn/Sun Journal

Cyclists start their ride Sunday on the third day of the Dempsey Challenge in Lewiston. Andree Kehn/Sun Journal

Cyclists begin the 100-mile ride Sunday in the Dempsey Challenge. Andree Kehn/Sun Journal

The last wave of cyclists waits Sunday to begin its ride on the third day of the Dempsey Challenge. Andree Kehn/Sun Journal

A cyclist speeds Sunday down Ferry Street in Lewiston on the third day of the Dempsey Challenge. Andree Kehn/Sun Journal

Cyclists ride Sunday along the River Road during the third day of the Dempsey Challenge in Lewiston. Andree Kehn/Sun Journal

Cyclists reach the top of a long hill Sunday during the third day of the Dempsey Challenge in Lewiston. Andree Kehn/Sun Journal

Patrick Dempsey cheers for participants virtually Sunday of the third day of the Dempsey Challenge in Lewiston. Dempsey is in Italy filming a movie and participated remotely. Andree Kehn/Sun Journal