Starting from the upper valley of the Willamette River's Coast Fork, where small pockets of pastures, fields, and rural residences are tucked among riparian deciduous forest, this stretch of road passes through mixed forest with Douglas-fir, big-leaf maple and alder at elevations of 1400 to 1600 ft. Bird along the main road, or walk along gravel side roads for forest species including Ruffed Grouse, Sharp-shinned Hawk, Pacific-slope Flycatcher, Steller's Jay, Chestnut-backed Chickadee, Varied and Swainson's Thrushes, Western Tanager, and Red Crossbill. Note: get gas beforehand because the mini-market in the hamlet of London has closed. This road can be closed due to snow in winter.
From Lakeside Park (Site B1) go S 10 mi on London Rd to MP 13. Just before bridge, turn L on Big River Rd (paved). Mileposts along Big River Rd are painted on the pavement. Bird along road to MP 8 3/4 at junction with BLM Rd 23-2-22 (GPS 43 33.567 N, 122 55.198 W), where the main route curves sharply to R and starts up hill toward Calapooya Divide (Site B4).