Patrick Dempsey has announced plans for a 100-mile bike trek fundraiser for the cancer center that bears his name at Central Maine Medical Center.

The Grey's Anatomy star, a Maine native who plays the hunky neurosurgeon known as Dr. Derek Shepherd, a.k.a. McDreamy, on ABC's medical drama, was in his native Lewiston, Maine, on Monday to promote the bike ride and 5-kilometer walk/run planned for October.

The event will benefit the Patrick Dempsey Center for Cancer Hope & Healing, which opened last spring. The actor has provided a $250,000 donation to the center.

Dempsey was born in Lewiston and grew up in the Turner-Buckfield area. He currently owns a home in Harpswell, on the state's coast, where his mom also lives.

Grey's Anatomy's Patrick Dempsey is an avid cyclist and auto racer.

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