This study aims to further understand the role of lexical coverage on L2 reading comprehension. It examines test scores of learners at or near the 90-95% coverage level to determine if this coverage range allows for comprehension of authentic texts. The findings suggest that 92-93% may be a threshold mark at which understanding of a text significantly increases. However, the data confirms results from previous studies: that many participants in the 90-95% coverage range have difficulty comprehending texts. The second part of the study examines the influence of dictionary use on lexical coverage and comprehension. The data indicates that, for learners at this proficiency level, dictionary use increases comprehension at a similar rate as increased coverage. However, most participants using dictionaries still did not achieve comprehension, though learners who utilized the dictionary links to increase their coverage to over 96% showed some significant gains in comprehension. (Contains 3 figures.)