Back to Illinois River Trail, Oak Flat to Indigo Creek Swimming hole and mine shaft on Indigo Creek — photo from Illinois River Trail, Oak Flat to Indigo Creek Swimming hole and mine shaft on Indigo Creek August 6, 2011 · u720SW,S720SW · f/3.5 · 1/320 ← Previous Photo 4 of 6 Next → All 6 photos from this hike Read the trip report