Sunday, August 21 – 9 am 2 hours, John Dunn Bridge Ethnobotany Hike ‒ Meet BLM intern Allie Heller on the west side of the John Dunn bridge for an easy 1.5 mile hike along the Rio Grande. This hike will help you identify plants that are common in the Rio Grande Gorge, and learn about their historical edible and medicinal uses.