Soils in Red Butte Canyon are derived from the weathering and erosion of the underlying bedrock. The distribution of the soils in the canyon is shown in Fig. 5. The relationship of the soils to the bedrock is apparent by comparing Fig. 5 with Fig. 3, a geologic map of the canyon. The soils map (Fig. 5) was adapted from Woodward et al. (1974). Soils in Red Butte Canyon have been characterized as dominantly strongly sloping to very steep and well drained. According to Bond (1979), most soils are neutral to slightly basic, vary in color from brick red to dark brown, with textures generally ranging from sandy to loamy clays. Depth of the soils is irregular, with depth to bedrock varying from nearly 2.4 m (94 in) at the canyon floor near the mouth to as little as 60 cm (24 in) or less on the slopes. Soil types include loams, silt loams, and dry loams. There is little profile development, but a pronounced litter layer and appreciable incorporated humus exist in places. Generally the soils are approximately 1 m (39 in) deep, especially those adjacent to streams. However, the steep rocky upper slopes have shallow and cobbly soils. Table 2 includes a description of each of the soils shown in Fig. 5. The descriptions were adapted from Woodward et al. (1974)