Here's mine. You should probably run anything by an attorney, regardless.
SNOW REMOVAL: Within 24 hours after the cessation of a weather event which has produced an accumulation of at least three inches of fresh snowfall, we will attempt to remove excess snow from walkways, driveways, and sidewalks. Snow and ice removal from walkways, sidewalks, steps, driveways, and parking lots, by us is a courtesy only and is not guaranteed unless otherwise specified in writing. It is your sole responsibility to clear snow and/or ice from the stairs, steps and deck leading to and from the entrance(s) of the Rental Unit, as well as other areas within your control. Salt is provided and should be used by you when merited by slippery conditions. You are aware that the walkways, sidewalks, steps, driveways, and parking lots may be slippery especially during winter months based on weather conditions. Even if the walkways, steps, driveways and parking lots have been shoveled, plowed or treated with salt/chemicals, you understand that slippery conditions often appear without notice and are not visible. You and your guests/invitees agree to release and hold Owner and his Agent(s) harmless for any damages or accidents caused by and/or related to inclement weather conditions.