During 1980-2002, the distribution of nesting and brood-rearing Snow Geese of the subspecies (Chen caerulescens caerulescens) in the Sagavanirktok River delta study area, Alaska, were documented during monitoring programs for the Endicott oilfield. Densities for Snow Goose nests on Howe Island were estimated based on mid- to late-June aerial photographic surveys. Brood-rearing flocks and total geese were based on late-July to early-August aerial survey or banding locations. The highest nesting density was mid-island; Snow Geese shifted their nesting distribution away from a den site when Arctic Foxes (Alopex lagopus) were present on the island. Most Snow Geese that rear broods in the Sagavanirktok River delta study area nested on Howe Island. Brood-rearing Snow Geese expanded their dispersal range with increasing numbers of total adult geese. The movement of brood-rearing Snow Geese to coastal salt marsh sites up to 35 km from Howe Island and movements into non-saline habitats along the west channel of the Sagavanirktok River suggest that the salt marsh resources in the Sagavanirktok River delta may not be able to support more than 500 Snow Geese.