Mesa de Anguila is a large topographical feature in the far western portions of Big Bend National Park, cut to the south by the Rio Grande. This uplift is one of the least visited areas of the park, and trails here are rough and precarious. The original goal was to hike cross country along an old pack trail to visit a small canyon along the river. It is February and Hunnemannia fumariifolia is blooming at this time. This small canyon is the only known location in Texas, and the US, for this species to occur.