Directions: To get to Thunder River head south out of Boulder on 93, and around Golden jump on 470 south. The first exit off 470 will be I-70 west, get on and drive for almost 150 miles to Glenwood Springs. Exit Glenwood Springs and head south on hwy82 towards Aspen. At the first stoplight after 14th street make a right and cross sunlight bridge over the Roaring Fork. The stop sign after the bridge is Midland Avenue offering access up and down the river with several access points. Continuing up 82 we reach the outskirts of Glenwood. Look for a right turn on Rd 109 to take you across the river and turn upstream to some more access areas called Coryell Ranch, and Aspen Glen on the left. These access points bring you up to the confluence with the Crystal River. Moving further up 82 we come to access points just upstream of the Carbondale Bridge, and then 3 miles upstream at the Catherine's Store Road. There is also access along Valley Road out of El Jebel, and Two Rivers Road just outside of Basalt, upstream and downstream of the confluence with the Frying Pan River. Upstream of Basalt we have great access to the Roaring Fork just off of Hwy 82 on river right as we move upstream, or River Road on the other bank. Some places to look for are the Woody Creek access, the Jaffe Park, and Henry Stein Park. Upstream of Aspen the access is better by foot and the Roaring Fork is much smaller than what we see just 30 miles downstream.