The downhole logging program during Leg 204 was designed to obtain the data needed to assess the occurrence and concentration of gas hydrate beneath Hydrate Ridge. It has been shown that it is possible to obtain gas hydrate saturations (percent of pore space occupied by gas hydrate) from NMR downhole logging data. In this study, NMR and density porosity data from the proVision and VDN density tools were used to calculate gas hydrate saturations at all eight LWD logging sites on Hydrate Ridge. The downhole logging–inferred distribution of gas hydrate beneath Hydrate Ridge and the adjacent slope basin is heterogeneous, with NMR-density-porosity–derived gas hydrate saturations at Site 1249, located near the crest of the ridge, ranging from 0% to nearly 50% in several intervals. In the slope basin sites, however, the NMR-density-porosity–derived gas hydrate saturations are much lower, ranging from 0% to a few percent along the flanks of the ridge. NMR-density-porosity logs from Leg 204 LWD logging sites also reveal the presence of significant free gas occurrence below the depth of the BSR on Hydrate Ridge.