Water storage by the forest floor and its relation to other characteristics of the forest floor were determined for three forest types (spruce-fir (Piceaspp. -Abiesspp.) partially, cut spruce-fir, and young lodgepole pine (PinuscontortaDougl.), and three predominant aspects (north, south, and east) on Marmot Creek experimental watershed in south western Alberta.There was no significant difference between uncut and partially-cut spruce-fir forest floor in water-storage capacity, depth of water held after draining, water held per unit thickness of forest floor, or dry weight, although forest-floor thickness was greater under uncut spruce-fir (11.36 cm) than partially cut (9.84 cm). The forest floor averaged for cut and uncut spruce-fir had greater water-storage capacity (1.93) than under young lodgepole pine(1.35), greater depth of water held (1.94 cm, 0.85 cm,) greater dry weight (89 506 kg/ha, 55 039 kg/ha), and greater thickness (10.60 cm, 4.59 cm). There was no difference in water held per unit thickness of forest floor (0.19 cm/cm under spruce-fir, 0.18 cm/cm under pine). The lower values for pine than for spruce-fir are attributed to an intense fire 30 years ago on the area presently supporting the young pine.Regressions are given of water held on forest-floor thickness, weight of water held on dry weight, and water-storage capacity on thickness.