The disturbance of grassland communities by trails and roads that cut through them could lead to their alteration or destruction. In order to examine whether trails affect grassland communities, I sampled the vegetation along transects that extended into serpentine and non-serpentine grassland, perpendicular to a fire road. I attempted to identify all species present and estimate the percent area that they dominated. I then examined how species composition, species richness, and percent cover by non-native species changed with distance from the road and soil substrate. Species composition changed and species richness decreased with increasing distance from the road in both community types. The percent cover by non-native species increased with distance from the trail in non-serpentine while it remained the same in serpentine. I suggest that intermediate levels of disturbance in areas close to the road keep species richness high by displacing the competitively dominant species. The difference in percent cover by non-natives between serpentine and on-serpentine communities are likely a result of non-native plants not being able to dominate in harsh serpentine soils. In general, trails do affect these grassland communities, but their affects [sic] are not extreme beyond 1-2 m of the trail.