Apple River Canyon State Park in far northwestern Illinois protects a hilly, spring-fed limestone canyon carved by the winding Apple River. The rugged bluffs, cool ravines and clear water feel much more like the Driftless region than typical Illinois farmland. Hiking trails climb the ridges and follow the river, offering scenic overlooks and chances to spot wildflowers and birds. Picnic areas sit close to the water, and camping gives visitors time to enjoy the quiet, wooded setting. Fishing and quiet walks along the river are popular ways to relax. There is no vehicle entry fee, and camping fees vary by site, from $8 to $45 per night. Spring wildflowers and fall color make those seasons especially rewarding.