Greg Westrich is the author of seven Maine hiking guides published by Falcon and is currently working on several others. His most recent guides are Hiking Waterfalls Maine and Hiking Maine, 4th edition—which has 18 new hikes in it. Also, in 2019 he published Hiking New Hampshire. Since 2013, he's mapped more than 700 hikes in Maine and 110 in New Hampshire. Hiking the 100 Mile Wilderness with be out in the spring of 2023. Greg has also published more than fifty articles and stories in newspapers, anthologies, and magazines, including Canoe & Kayak, Birding Watching, and Down East. He's written about everything from backyard mushrooms to wedding traditions in Aroostook county.

He earned an MFA in Creative Writing from University of Southern Maine's Stonecoast Program. Greg teaches English at Deer Isle/Stonington High School. Greg's also worked as a carpenter, sous chef, newspaper carrier, fence installer, stay-at-home parent, children's educational book editor, bookstore manager, and warehouse supervisor in an Alaskan salmon cannery. He spends way too much time thinking about the "nature writing problem."

He lives in Glenburn, Maine with his wife Ann, their two children Emma and Henry, and too many pets. He was born in Cincinnati and has visited 49 state and most Canadian provinces. Maine is his favorite place, which is why he's lived there for twenty six years.