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other small reservoirs within the drainages of the Colorado, Gunnison, Dolores, San Juan, and White rivers. In western Colorado, northern pike were first stocked in 1962 by the state wildlife agency in Vallecito Reservoir in the San Juan River drainage near Durango and in Joe Moore Reservoir near the town of Mancos in the Dolores River drainage (Wiltzius 1985). Wiltzius (1985) in his review of previous gamefish stockings in Colorado, reported only one stocking for northern pike in the Yampa River drainage and that record was inaccurate. Wiltzius (1985) reported that Divide Creek Reservoir received northern pike in 1970 and that this reservoir was in the Yampa River Basin. This was inaccurate because this small reservoir, southwest of Elk Springs, Colorado, is in the White River drainage. Wiltzius (1985) did not report any other records for the Yampa River drainage but records at the CDOW show that 571, 50 to 100 mm long northern pike obtained from Colorado State University were stocked in Elkhead Reservoir by the CDOW in 1977 (P. Martinez, pers. comm.). Presumably, the stocking was to reduce an over-abundance of suckers and fathead minnows (W. Elmblad ,pers. comm.). Elkhead Creek is a Yampa River tributary located about 5 miles upstream of Craig and the reservoir dam is about 4 miles up the tributary (Figure 1). Northern pike were not collected in the Yampa River by researchers until 1979. Prior to that, northern pike were not reported in stream surveys of the Yampa River in the 1950s (Lemons 1954; Klien 1957) and none were captured during intensive sampling from Steamboat Springs to Lily Park between 1975 and 1978 (Carlson et al. 3