
Blue Dun Loop in Island Park, ID is a short, scenic trail through geothermal features and colorful hot-spring terrain. Photographers come for mineral-blue pools, steaming vents (seasonal), and dramatic steam-to-snow contrasts in winter. Visit early for soft light and fewer hikers; trails can be slick—use proper footwear.

Blue Dun Loop in Island Park, ID is a short, scenic trail through geothermal features and colorful hot-spring terrain. Photographers come for mineral-blue pools, steaming vents (seasonal), and dramatic steam-to-snow contrasts in winter. Visit early for soft light and fewer hikers; trails can be slick—use proper footwear.