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A study of grizzly bears (Ursus arctos) in 1984 and 1985 in Denali National Park investigated the differences between family and single bear habitat use patterns. Differences in family age, seasons, and years contributed to differences in habitat use patterns. Proportions of cub families seen in the spring were low but increased through the field season, whereas proportions of observed yearlings remained constant. Seasonal patterns of habitat use were generally consistent among cub and yearling families and single bears. Small but notable proportions of observations of families were made in more rugged, isolated terrain, especially in spring. Habitat use patterns between the years were significantly different and probably a result of a late spring and wetter weather in 1985. The 1984 habitat use pattern was more concentrated in extreme habitat combinations (high-rugged vs. low-flat) than was the 1985 pattern.