Temporal and spatial patterns of hydrologic flowpaths are important factors in understanding stream flow dynamics. We hypothesize that hydrologic flowpaths in soils change from vertical percolation during fall wet-up to lateral flow when saturated in winter and early spring. An oak woodland watershed in northern California was instrumented to monitor watershed hydrology. Stream flow was measured at 15-minute intervals during the 2006-2007 water year. Water content was monitored in 60 soil profiles within four horizons (A, AB, Bt, and C/Cr). A perched water monitoring trench located at the base of the watershed was retrofitted with tipping buckets to measure lateral flow from three soil profiles within the same four horizons. A total of 50 cm of rain was recorded for the year resulting in two stream flow events. The first event, from 2/09/07 to 2/12/07, occurred after 32 cm of cumulative rain. Before the event (2/8/07), water content in the top 10 cm of soil ranged from 0.19 to 0.39 m³ m^-3 in the watershed. During the storm, water content in the top 10 cm ranged from 0.25 to 0.45 m³ m^-3.  Lateral flow was missed due to equipment failure. The second event (2/24/07-3/01/07) occurred after 5 cm of additional rain, and corresponded in time with lateral flow from AB horizons. The total amount of lateral flow over the 16-hr storm event was 0.3 m³ in A, 1.5 m³ in AB, 0.4 m³ in Bt, and 0.2 m³ in C horizons.  Before the event (2/24/07), water content in the top 10 cm ranged from 0.14 to 0.40 m³ m^-3 in the watershed. During the storm, water content in the top 10 cm ranged from 0.21 to 0.47m³ m^-3. Preliminary information indicates that stream discharge responds immediately to lateral flow once watershed storage capacity is reached and AB horizons are saturated.