October ultramarathons in United States (Pacific North West)

Rocky bluffs, sandy beaches, old-growth rainforest, and headlands with Pacific Ocean views in the Cape Perpetua National Scenic Area

Diverse terrain from dense forests to alpine areas, steep climbs and demanding descents, 7,000 feet of elevation gain, reaching 8,550 feet high point

Double out-and-back route on asphalt, gravel, and dirt trails with over 10,000 feet of elevation gain through Stub Stewart State Park and Vernonia Lake

Long-distance route along the Baker Lake Trail with Mt. Baker views and trailside scenery in the Baker Lake Recreation Area

Rugged Mount Bachelor alpine trails with steep climbs, high-elevation terrain from 7,280 to 9,027 feet, runnable lower sections, and festive aid stations.

Challenging 50k on technical single-track and logging roads along Moscow Mountain, featuring significant elevation and Palouse vistas.

Scenic loop course through Ponderosa State Park, featuring accessible trail terrain and a community-focused atmosphere

50k loop in Riverside State Park with about 3,100 feet of climbing, river views, rocky sections, switchbacks, prairie and pine forest

Smooth single track through golden larches, with demanding ascents over 6000–7000 feet and views of the Entiat River Valley, Clark Mountain, and Glacier Peak

Scenic single-track loops beneath ancient cedars and firs, panoramic Puget Sound views, runnable trails with moderate hills, urban park setting

Trail race through Columbia River Gorge landmarks, 6500 ft elevation gain, autumn forest scenery, waterfalls, single-track and mixed terrain.

Remote Pacific Northwest mountain course with 7,000 feet of climbing, summit views of Three Sisters, ridgeline traverses, and lush singletrack forest descents

River valley trails with mostly gentle elevation, lush scenery, passages by Dingford Creek bridge and Goldmyer Hot Springs, loops toward Dutch Miller Gap

Scenic 2.45-mile single-track loop near Blewett Pass summit, diverse forests, golden larches, and sweeping mountain views

Lush forest singletrack, misty canyon paths, and the Trail of Ten Falls with routes behind waterfalls in Silver Falls State Park

Singletrack out-and-back along the Upper Rogue Wild & Scenic River, 2300 feet of ascent, rolling terrain, basalt lava rock, rooty sections

Steep elevation changes, rocky and muddy trails, a mile 12 creek crossing, and hilly terrain through Silver Falls State Park in Oregon’s mid Willamette Valley

Challenging course at Loup Loup Ski Bowl with significant elevation changes, 35-45% off-trail terrain, golden autumn larches, and demanding downhill segments