Noun, 1. field guide - a guidebook describing natural objects of some type that might be encountered in the field; “A field guide to Leelanau” is dedicated to helping you feel at home in Leelanau County and Traverse City. This guide is a glimpse into all our favorite spots; from the perfect cup of coffee in the morning to our beloved seasonal afternoon hike. Travel Leelanau and Traverse like a local.