Results/Conclusions: Our results characterizing patterns of transport of giant kelp (Macrocystis pyrifera) exported from kelp forests indicate high spatial and temporal variability in drift kelp transport and delivery to beaches, including hotspots of kelp deposition along the shoreline and strong seasonal patterns of deposition. Fresh kelp plants were most abundant in the lee of headlands and least abundant on narrow stretches of beach with seacliffs or seawalls suggesting the strong influence of coastal topography and beach conditions on drift kelp deposition and retention. Along the 25 km study coast, the number of beached kelp plants varied more than 2 orders of magnitude among months with greatest number of kelp plants (>9000) observed in late summer and the lowest number (<40) in spring. The ending distributions of recovered drift cards and drifter tracks along the shoreline suggest that the majority of drift kelp is deposited on beaches but that proportion varies seasonally. The majority of tagged kelp plants moved <5km before beaching but some tagged kelp plants were reported on beaches much further away, including Monterey Bay and Santa Monica Bay. Loss of tagged kelp plants and kelp plant fate indicated by drifter tracks varied strongly among the 3 study reefs. These observations will allow us to characterize the dynamics of trophic subsidies and the consequences of this variability for recipient beach ecosystems.