Some facilities will allow you to show up on the day and ski (some even for free), but it's always wise to reserve time slots for ski resorts on your day and visit by buying them online. Remember, peak tourism season tends to see lots of attendance, so make reservations early. Rental equipment can be found at all of these sites for those worried about bringing their own gear. The facilities in most ski resorts are available and operating year-round, making it easier to plan a trip at different times of the year.