- Region
- OR, USA
- Country
- United States
- Best for
- hiking
- Best season
- Spring, Summer
- Permits
- Confirm current permit requirements and wi…
- Managed by
- U.S. Forest Service, Rogue River-Siskiyou National Forest
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Grassy Knob Wilderness trip tools
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Photos of Grassy Knob Wilderness
How to get there
Use Grassy Knob Trailhead for access to Grassy Knob Trail #1241. Confirm driving directions and current access conditions with Rogue River-Siskiyou National Forest before departure. Topographic map coverage includes Father Mountain, Mt. Butler, Port Orford, and Sixes.
- Grassy Knob Trailhead
The identified trailhead serving Grassy Knob Wilderness, providing access to Grassy Knob Trail #1241. Confirm approach-road conditions before travel.
- Grassy Knob Trail #1241
The named on-foot approach from Grassy Knob Trailhead, not a separate vehicle access point. Plan around the wilderness’s steep terrain and limited access.
Sources: fs.usda.gov · University of Montana / federal agency partners · Wilderness Connect / federal wilderness boundary inventory. Confirm road and trailhead conditions with the managing agency before you leave.
OR, USA · United States
- Fishing
- Hunting
- Winter Camping
- Skiing
- Sea Kayaking
- Beachcombing
- Hiking
- Backpacking
Steep coastal rain forest
Grassy Knob Wilderness protects 17,159 acres of rugged rain forest in Oregon. Designated in 1984, it rises from almost sea level to summits above 2,000 feet, including 2,342-foot Grassy Knob on the western boundary. The Wild and Scenic Elk River marks the southern boundary. Coniferous evergreens cover steep ground, with a tangled understory that makes travel away from trails extremely rough. This is a place to plan around difficult footing and limited access rather than ambitious mileage. Grassy Knob Trailhead provides access to Grassy Knob Trail #1241, the named hiking approach. For a first visit, use that established approach rather than treating the forest, river boundary, or interior drainages as ready-made walking routes.
Old-growth cedar and salmon streams
Rare old-growth stands of Port Orford cedar are a defining feature of Grassy Knob. Some trunks exceed six feet in diameter, and the trees carry distinctive twisting, drooping limbs. Beneath the conifers, moss-laden glens and vine maple add detail to a forest that can otherwise feel densely enclosed. Dry Creek, the wilderness’s primary drainage, supports a healthy population of spawning salmon. Smaller turbulent streams drop over waterfalls and pass through shaded ravines. These waterways are part of the terrain’s difficulty as well as its ecological value; do not assume a drainage offers an easy line of travel. Keep disturbance low around streambanks and old-growth stands, and use Leave No Trace practices throughout a visit.
Weather, preparation, and wilderness rules
Summer is typically hot, though shaded ravines offer cooler conditions. Autumn brings red vine-maple leaves, while winter brings an average of 130 inches of rain from the nearby Pacific. Weather can change rapidly, so carry rain protection and insulating layers even when starting in fair conditions. Potable water is not available; bring drinking water or equipment to treat collected water. Limited access and extremely rough off-trail travel call for navigation tools and conservative turnaround decisions. Motorized equipment and mechanical transport, including bicycles, are prohibited. Caching equipment, personal property, or supplies is also prohibited, as is possessing or storing hay or viable unprocessed grain. Overnight groups may not exceed 12 people or nine saddle or pack animals; that limit does not apply to day use.
Where on earth
Satellite imagery flying in from a world view to Grassy Knob Wilderness, United States. Use the + / − buttons, or click the map to zoom with your scroll wheel; drag to pan and pinch to zoom on touch.
Coordinates
- Decimal degrees
- 42.7445, -124.3310
- Latitude (DMS)
- 42° 44′ 40.1″ N
- Longitude (DMS)
- 124° 19′ 51.7″ W
Coordinates are an access-point reference for Grassy Knob Wilderness, not a route. Carry a paper map and confirm trailhead or put-in access with the managing agency before you go.
Topic summary
Covered in a tangled rain forest of coniferous evergreens thick with an ankle-grabbing understory, Grassy Knob Wilderness lies rugged and steep. Access is limited and off-trail hiking rates as an extremely...
Key takeaways
- Region: OR, USA
- Country: United States
- Good for: hiking
- Coordinates: 42.744, -124.331
Intended uses
hiking
Keep planning
Popular pursuits at Grassy Knob Wilderness
- Fishing
Resident gamefish, seasons, and the water that holds them.
- Hunting
Seasons, tags, and the units that hold animals.
- Winter Camping
Cold-season travel and camp craft; layering matters more than mileage.
- Skiing
Ski-touring access when the road closes for the season.
- Sea Kayaking
Coastal crossings, tides, and protected camps.
- Beachcombing
Tide-line walking between camps.
Animals around Grassy Knob Wilderness
Steep coastal rain forest
Grassy Knob Wilderness protects 17,159 acres of rugged rain forest in Oregon. Designated in 1984, it rises from almost sea level to summits above 2,000 feet, including 2,342-foot Grassy Knob on the western boundary. The Wild and Scenic Elk River marks the southern boundary. Coniferous evergreens cover steep ground, with a tangled understory that makes travel away from trails extremely rough. This is a place to plan around difficult footing and limited access rather than ambitious mileage. Grassy Knob Trailhead provides access to Grassy Knob Trail #1241, the named hiking approach. For a first visit, use that established approach rather than treating the forest, river boundary, or interior drainages as ready-made walking routes.
Old-growth cedar and salmon streams
Rare old-growth stands of Port Orford cedar are a defining feature of Grassy Knob. Some trunks exceed six feet in diameter, and the trees carry distinctive twisting, drooping limbs. Beneath the conifers, moss-laden glens and vine maple add detail to a forest that can otherwise feel densely enclosed. Dry Creek, the wilderness’s primary drainage, supports a healthy population of spawning salmon. Smaller turbulent streams drop over waterfalls and pass through shaded ravines. These waterways are part of the terrain’s difficulty as well as its ecological value; do not assume a drainage offers an easy line of travel. Keep disturbance low around streambanks and old-growth stands, and use Leave No Trace practices throughout a visit.
Weather, preparation, and wilderness rules
Summer is typically hot, though shaded ravines offer cooler conditions. Autumn brings red vine-maple leaves, while winter brings an average of 130 inches of rain from the nearby Pacific. Weather can change rapidly, so carry rain protection and insulating layers even when starting in fair conditions. Potable water is not available; bring drinking water or equipment to treat collected water. Limited access and extremely rough off-trail travel call for navigation tools and conservative turnaround decisions. Motorized equipment and mechanical transport, including bicycles, are prohibited. Caching equipment, personal property, or supplies is also prohibited, as is possessing or storing hay or viable unprocessed grain. Overnight groups may not exceed 12 people or nine saddle or pack animals; that limit does not apply to day use.
Route options
- Grassy Knob Trail #1241 day hike
Use the named trail from Grassy Knob Trailhead for a day visit. Set a conservative turnaround based on conditions and available daylight rather than assuming a particular destination or loop.
- Grassy Knob Trail #1241 backpacking approach
Use the same identified trail access when planning an overnight wilderness trip. Confirm trail conditions and suitable overnight plans with the managing forest; do not assume there are established campsites or connecting trails. Overnight group limits apply.
Sample itineraries
- Grassy Knob Trail day hike · 1 day
Start at Grassy Knob Trailhead on Grassy Knob Trail #1241. Plan an out-and-back suited to current conditions, allowing extra time for rugged terrain. Keep the outing on the trail rather than extending into the extremely rough off-trail understory.
- Experienced backpacker's overnight · 2 days
Use Grassy Knob Trailhead as the starting point for a conservative overnight plan. Confirm trail conditions and suitable camping options with the Forest Service before leaving. Carry navigation tools, rain protection, and water treatment; avoid committing to an unverified off-trail route through steep ravines.
Seasonal conditions
Spring
Spring
Plan around the forecast rather than assuming mild conditions. Rapid weather changes, steep rainforest terrain, and turbulent streams call for waterproof layers, reliable navigation, and conservative route choices.
Summer
Summer
Summers are typically hot, while shaded ravines remain cool. Carry drinking water and treatment equipment; potable water is not available at the site. Keep rain protection accessible because weather can change rapidly.
Fall
Autumn
Red vine maple leaves brighten moss-covered glens. Prepare for rapid weather changes and take care with footing in the dense understory and steep terrain.
Winter
Winter
Winter brings an average of 130 inches of rain from the nearby Pacific. Chilly rain, rapid weather changes, and rugged terrain demand waterproof clothing, protected insulation, and cautious decisions around streams and ravines.
| Season | Window | Conditions |
|---|---|---|
| Spring | Spring | Plan around the forecast rather than assuming mild conditions. Rapid weather changes, steep rainforest terrain, and turbulent streams call for waterproof layers, reliable navigation, and conservative route choices. |
| Summer | Summer | Summers are typically hot, while shaded ravines remain cool. Carry drinking water and treatment equipment; potable water is not available at the site. Keep rain protection accessible because weather can change rapidly. |
| Fall | Autumn | Red vine maple leaves brighten moss-covered glens. Prepare for rapid weather changes and take care with footing in the dense understory and steep terrain. |
| Winter | Winter | Winter brings an average of 130 inches of rain from the nearby Pacific. Chilly rain, rapid weather changes, and rugged terrain demand waterproof clothing, protected insulation, and cautious decisions around streams and ravines. |
Permits, fees & closures
Confirm current permit requirements and wilderness regulations with Rogue River-Siskiyou National Forest before visiting.
Official source: Rogue River-Siskiyou National Forest | Grassy Knob Wilderness · Verified October 30, 2026
Hazards & regulations
- Steep, rugged terrain and ankle-grabbing understory make off-trail travel extremely rough.
- Limited access makes conservative route planning and dependable navigation important.
- Turbulent streams, waterfalls, and steep ravines require caution; avoid committing to unsafe crossings.
- Weather can change rapidly, with heavy, chilly winter rain increasing the risk of cold exposure.
- Typically hot summers require attention to hydration; no potable water is available at the site.
What to pack for Grassy Knob Wilderness
- Topographic map covering the planned route
- Compass and offline navigation
- Headlamp
- First-aid kit
- Emergency shelter
- Waterproof jacket and rain pants
- Insulating layers protected in a dry bag
- Sturdy footwear with reliable traction
- Long pants for dense understory
- Drinking water
- Water filter or other treatment
- Food and waste bags
- Weather-resistant shelter for overnight trips
- Sleeping gear protected from rain
Grassy Knob Wilderness FAQ
- Where is the documented hiking access?
- Grassy Knob Trailhead provides access to Grassy Knob Trail #1241. Access to the wilderness is limited; confirm current approach and trail conditions with Rogue River-Siskiyou National Forest.
- Is this a good place for casual off-trail exploration?
- No. Dense, ankle-grabbing understory covers rugged, steep ground, and off-trail hiking is extremely rough. Choose a conservative trail outing unless equipped and experienced for difficult navigation.
- What overnight group limits apply?
- Overnight groups may not exceed 12 people or 9 saddle or pack animals. These limits do not apply to day use.
- Are bicycles or equipment caches allowed?
- Bicycles, motorized equipment, and mechanical transport are prohibited. Caching equipment, personal property, or supplies is also prohibited, as is possessing or storing hay or unprocessed viable grain.
- Is drinking water available?
- No potable water is available at the site. Carry drinking water and treat any collected stream water. Restroom availability is not established, so confirm facilities before departure.
- What defines the landscape?
- Grassy Knob Wilderness covers 17,159 acres of steep conifer rainforest. Grassy Knob reaches 2,342 feet on the western boundary, and the Wild and Scenic Elk River outlines the southern boundary. Old-growth Port Orford cedar, mossy glens, and waterfall-cut ravines characterize the area.