Great late-September day for a ride. Started from the Oregon Trail Interp Center. First 6 miles was a nice warm-up on Clackamas River Drive, which was a little busy for late morning. Some modest climbing on Hattan Rd and Fishers Mill Rd, about 500 feet in 7 miles. First rest stop at the Mattoon Rd-Redland Rd intersection (mile 16.5). The next 4.5 miles was the main climbing, on Fellows Rd. A steep 0.7 mile section at the start, then several rollers until the final steep climb just before the Lower Highland Rd junction. 1725 feet climbing in the first 22 miles. A couple long, steep rollers on Lower Highland, then a 1.5 mile gradual downhill to the Ridge Rd turn. Turned onto Ridge Rd for a 6.8 mile segment. Mostly downhill at the start, then flats with some minor inclines. The final 2 miles to Fishers Mill was downhill. Rode Fishers Mill Rd to Springwater Rd, which included one last steep climb. The remaining 15 miles was via Eaden Rd, Baker's Ferry Rd and Clackamas River Dr. Would not recommend riding Clackamas River Dr on nice weekends.