Wear comfortable clothes and good walking shoes. Fanny packs or backpacks filled with essentials for the weather are smart. Fill out a start card and take it to the Start Table.
Many walks also offer awards depicting something unique about that particular trail, which is extra.
Make sure you find out if the walk is marked or you will need a map. Make sure you get a map if it's needed. Some events require you to visit another table to get a starting number, but for the most part your registration is complete. You may want to visit the table of brochures before you begin the walk or they might be gone by the time you get back. Some events have several trails.