Travel time can vary greatly based on route difficulty, individual skill, and weather. A rough estimation is one mile per hour plus an additional hour for every thousand feet of vertical gain. Speed may increase on clear days when a route has already been broken-out but could be slower in poor visibility or without a broken trail. To evaluate your capabilities, take a test ski tour with a full pack. Remember, tasks like route finding, taking breaks, changing layers, and gear adjustments can add significant time to your trip.