The demand for all forms of outdoor recreation will increase at an unprecedented pace during the next 25 years in the New York Metropolitan Region, and in the United States as a whole. There will be a substantial rise in each of the factors which most affect the demand for recreation: population, per capita income, leisure time, and ease of travel. Growth in any one of these separate factors would be significant; when their gains are combined the impact on the need for parks and other open space becomes a major challenge of our time.