The study compares distances to outlets for obtaining healthy, affordable food in tribal areas to those for the general U.S. population, with implications for improving the health of tribal populations. Errata: On April 9, 2015, the estimate for average distance from a grocery for all tribal areas in Table 2 on page 13 was corrected to fix a calculation error. References to the number in the text on pages 13-16 were updated to reference the revised number. The references to the estimate for population share and population percentiles for all ANVSA individuals in Table 3 on page 17 was also corrected.