Grassy Top

Grassy Top spans 13,485 acres in the Idaho Panhandle National Forests of Pend Oreille County, Washington, in the Selkirk Mountains of the inland Northern Rockies. The roadless area carries Grassy Top Mountain, Hall Mountain, High Rock Mountain, Tillicum Peak, and Orwig Hump, with Pass Creek Pass and Packrat Gorge dropping between them. Streams drain into the North Fork Granite Creek watershed and on into the Pend Oreille River. Named tributaries include Sullivan Creek, Hall Creek, Johns Creek, High Rock Creek, Pass Creek, Cache Creek, Tillicum Creek and its north fork, Willow Creek and its north fork, the South Fork Granite Creek, Middle and North Fork Harvey Creek, Orwig Creek, and Gypo Creek; the cascades of Granite Falls and LaSota Falls mark the steeper drops.

Forest communities reflect the inland-maritime gradient of the Selkirk crest. Lower slopes carry Southern Rockies Mixed Conifer Forest of western red-cedar (Thuja plicata), western hemlock (Tsuga heterophylla), grand fir (Abies grandis), Douglas-fir (Pseudotsuga menziesii), and western white pine (Pinus monticola), with an understory of devil's-club (Oplopanax horridus), wild sarsaparilla (Aralia nudicaulis), single-flowered clintonia (Clintonia uniflora), and twinflower (Linnaea borealis). Mid-elevation sites support Rocky Mountain Lodgepole Pine Forest and Northern Rockies Western Larch Savanna, where lodgepole pine (Pinus contorta) and western larch (Larix occidentalis) grow alongside quaking aspen (Populus tremuloides) and tobacco ceanothus (Ceanothus velutinus). The upper ridges hold Rocky Mountain Wet Subalpine Spruce-Fir Forest of Engelmann spruce (Picea engelmannii) and subalpine fir (Abies lasiocarpa), grading into Northern Rockies Subalpine Shrubland with white-flowered rhododendron (Rhododendron albiflorum), oval-leaf huckleberry (Vaccinium ovalifolium), and stands of whitebark pine (Pinus albicaulis) just below the open meadows of Grassy Top Mountain.

Inland-Northwest carnivores still move through this landscape. American marten (Martes americana) and Canada lynx (Lynx canadensis) hunt snowshoe hare (Lepus americanus) through the lodgepole and subalpine forest, while cougar (Puma concolor), bobcat (Lynx rufus), and gray wolf (Canis lupus) work the lower drainages alongside elk (Cervus canadensis), moose (Alces alces), and white-tailed deer (Odocoileus virginianus). Bighorn sheep (Ovis canadensis) occupy the open south-facing benches of Hall Mountain. Spruce grouse (Canachites canadensis) feed on conifer needles in the upper forest; dusky grouse (Dendragapus obscurus) and ruffed grouse (Bonasa umbellus) hold the mid-elevation mosaic. Clark's nutcracker (Nucifraga columbiana) caches seeds in whitebark pine — endangered on the IUCN red list — while mountain lady's-slipper (Cypripedium montanum), vulnerable on the same list, flowers in shaded conifer forest. Bull trout (Salvelinus confluentus) and westslope cutthroat trout (Oncorhynchus lewisi) hold the cold tributary creeks, where harlequin duck (Histrionicus histrionicus) and American dipper (Cinclus mexicanus) work the riffles. Portions of this area fall within the potential range of several federally listed species; see the Conservation section for details.

A visitor climbing toward Grassy Top Mountain or following the ridge between Hall Mountain and Tillicum Peak moves first through old western red-cedar bottoms where Sullivan Creek and Hall Creek run cold, then into lodgepole and western larch flats where the gold of larch needles drifts in October. Pass Creek Pass crosses the divide above Packrat Gorge. The summit meadows of Grassy Top — the namesake parkland — hold huckleberry, western turkeybeard (Xerophyllum tenax), and scattered subalpine fir, with views east across the Pend Oreille basin and west toward the Columbia.

Grassy Top is a 13,485-acre Inventoried Roadless Area in the Idaho Panhandle National Forests of Pend Oreille County, Washington, within the USFS Northern Region. The area is managed within the Priest Lake Ranger District and is protected under the 2001 Roadless Area Conservation Rule.

Archaeological evidence from a 1987 excavation at Sullivan Lake, immediately west of the area, established that Native Americans had inhabited the upper Pend Oreille Valley as long as 8,000 to 11,000 years ago [4]. When the first outside explorers and fur traders entered the region in the early 1800s, the Kalispel tribe occupied the valley [4][2]. The Pend Oreille River valley is the ancestral homeland of the Kalispel Tribe, whose reservation remains in the county today [3]. From September 27 through October 6, 1809, Canadian explorer David Thompson of the North West Company scouted the Pend Oreille River, which he called the Saleesh [4]. In 1844, Jesuit missionary Father Jean Pierre De Smet — together with Father Hoecken — established the St. Ignatius Catholic Mission south of Metaline Falls [4][2].

Industrial activity reached the upper drainages in the late nineteenth century. In 1859, prospectors found gold in placer sediments between Sullivan Lake and the Pend Oreille River and worked the river through Z Canyon [4]. After the easier gold had been extracted by white prospectors, Chinese placer miners worked the riverbanks for years [3]. By the late 1870s, outcroppings of lead, zinc, and some silver had been discovered around the Metalines, drawing a new flood of prospectors into the Selkirk slopes [4]. The Great Northern Railroad reached Newport in 1892, and in 1910 Coeur d'Alene operator Frederick Blackwell's Idaho & Washington Northern Railroad reached Metaline Falls [4]. On March 27, 1909, Lewis P. Larsen incorporated the Inland Portland Cement Company; that same year the company built the Sullivan Creek Project, including Sullivan Lake Dam, Mill Pond Dam, and the Sullivan Creek Powerhouse, to supply hydroelectric power to the cement works and the town [4][5][6]. The Sullivan Creek facilities generated power until 1956 [5][6].

Federal forest management arrived in this same period. On July 1, 1908, the Kaniksu National Forest was created from part of the Priest River Forest Reserve, with lands extending across the Idaho-Washington border into Pend Oreille County [7]. Pend Oreille County itself was carved from Stevens County on June 10, 1911, the last county established in the state of Washington [2][4]. In 1973, the Kaniksu was administratively merged with the Coeur d'Alene and St. Joe National Forests to form the Idaho Panhandle National Forests [1][7]. The Sullivan Creek hydroelectric license was surrendered in 2013, and Mill Pond Dam was removed in 2017, returning Sullivan Creek to free-flowing conditions [5][6].

Vital Resources Protected

• Cold Headwater Stream Integrity: Streams forming inside Grassy Top — Sullivan Creek, Hall Creek, Johns Creek, High Rock Creek, Pass Creek, the South Fork Granite Creek, and the North Fork Granite Creek itself — flow through Northern Rockies Foothill Streamside Woodland and Rocky Mountain Subalpine Streamside Woodland with intact riparian canopy. The roadless condition preserves shaded, sediment-stable channels with the cold temperatures, gravel substrate, and large woody debris that threatened bull trout and westslope cutthroat trout require for spawning and rearing.

• Large Carnivore and Caribou Range Connectivity: Continuous spruce-fir forest, lodgepole stands, and Northern Rockies Subalpine Woodland and Parkland link the area to the broader Selkirk ecosystem, the only U.S. range of the Southern Mountain Caribou. The unbroken cover supports federally threatened grizzly bear, Canada lynx, and wolverine movement across the Pend Oreille–Idaho border landscape, and provides interior security habitat for gray wolf, cougar, and American marten.

• Whitebark Pine and Subalpine Refugia: Stands of threatened whitebark pine on the ridges of Grassy Top Mountain and Hall Mountain anchor an upper-elevation community that includes Engelmann spruce, subalpine fir, and the open summit meadows that give the area its name. Roadless status maintains the seed-caching cycle between whitebark pine and Clark's nutcracker, preserves climate-refugia habitat for high-elevation species, and shields these stands from the road-associated disturbance that accelerates white pine blister rust and mountain pine beetle outbreaks.

Potential Effects of Road Construction

• Sedimentation and warming of bull-trout streams. Road construction on the steep slopes around Packrat Gorge, Conto Gulch, and the Granite Falls drainage would expose mineral soils to surface erosion and mass wasting. Sediment delivered to Sullivan, Hall, Pass, and Granite creeks would embed the clean gravels that bull trout and westslope cutthroat trout require for redd construction, while canopy removal at crossings would raise summer water temperatures past the thermal threshold for cold-water salmonids. These effects compound across the watershed and persist for decades.

• Fragmentation of carnivore and caribou corridors. A road through the Selkirk crest would sever the unbroken forest band that supports lynx, wolverine, grizzly bear, and the Southern Mountain Caribou DPS. Open roads increase mortality risk for these wide-ranging species through vehicle collisions, displacement from preferred cover, and elevated human access for poaching and disturbance. Loss of connectivity in this last U.S. caribou range is functionally irreversible once the corridor is broken.

• Invasive species spread and edge effects in subalpine communities. Road shoulders create linear corridors of disturbed bare soil through which the non-native plants already documented in the area — spotted knapweed, Dalmatian toadflax, common tansy, bull thistle, and oxeye daisy — can colonize whitebark pine stands and the open meadows of Grassy Top Mountain. Once established, these species displace the native huckleberry, western turkeybeard, and subalpine forbs that support nutcrackers, grouse, and pollinators. Edge effects from each road segment also dry adjacent forest interior and accelerate beetle and disease pressure on whitebark pine.

Grassy Top covers 13,485 acres of mountainous Selkirk country in the Idaho Panhandle National Forests of Pend Oreille County, Washington. Access points include the Grassy Top - North Fork Harvey, Grassy Top - Pass Creek Pass, Hall Mountain, Granite Falls, Noisy Creek, Lakeshore North, and Lakeshore South trailheads, all reached from the road network around Sullivan Lake and Metaline Falls.

Hiking and backpacking. The area's trail system links the major ridges. The Shedroof Divide Trail (#512, 13.3 miles) traces the high country at the area's east edge, and Grassy Top Trail (#503, 8.0 miles) and North Fork Grassy Top (#379, 6.3 miles) reach the summit meadows. Tillicum Peak Trail (#284, 5.5 miles) and Tillicum Creek Trail (#261, 4.4 miles) climb the western drainages. Shorter routes include Hall Mountain (#540, 2.6 miles), Orwig Hump (#373, 2.9 miles), High Rock Creek (#264, 2.7 miles), and the summit spur to High Rock Mountain (#382, 0.3 miles). The 3.0-mile Bunchgrass Meadows Trail (#252) crosses a regionally significant subalpine fen. The Sullivan Lake Trail (#504, 4.4 miles) provides a low-elevation east-shore route between the Lakeshore North and Lakeshore South trailheads.

Horseback travel. Stock-supported native-material tread carries riders along Shedroof Divide (#512), Grassy Top (#503), North Fork Grassy Top (#379), Bunchgrass Meadows (#252), Tillicum Creek (#261), Noisy Creek (#588, 5.2 miles), and Roosevelt (#266, 1.4 miles). The Hall Mountain - Grassy Top connector (#533, 4.9 miles) links these into longer multi-day rides.

Fishing. Sullivan Creek, Hall Creek, Johns Creek, Pass Creek, the North Fork Granite Creek, and the high tributaries within the roadless area carry threatened bull trout and westslope cutthroat trout. Anglers can also fish Sullivan Lake itself, a cold-water destination at the eastern edge of the area, where sockeye salmon, redside shiner, and other species are documented. Bull trout protections apply; check current Washington Department of Fish and Wildlife regulations.

Hunting. General-season opportunities include American black bear, mule deer, white-tailed deer, elk, and moose under Washington WDFW seasons; ruffed, dusky, and spruce grouse hold the forest mosaic. Bighorn sheep occupy the south-facing slopes of Hall Mountain and are regulated by limited-quota permit. Federally listed grizzly bear, Canada lynx, wolverine, and Southern Mountain Caribou range overlaps the area; hunters must positively identify quarry.

Birding. Five eBird hotspots within 24 km record between 79 and 149 species; the most active is Sullivan Lake with 202 checklists. Documented species in this landscape include harlequin duck along Sullivan Creek and the Pend Oreille tributaries, Clark's nutcracker in the whitebark pine stands, spruce grouse and boreal chickadee in the subalpine forest, and trumpeter swan, bald eagle, common and Barrow's goldeneye, and hooded merganser on the lake.

Camping. The Forest Service operates four developed campgrounds in the immediate access zone — East Sullivan, West Sullivan, Sullivan Lake Group, and Noisy Creek — all on or near the shores of Sullivan Lake. The interior of the roadless area is reached only on foot or stock from these staging points.

Roadless context. Recreation here depends on the absence of roads. Cold tributary streams sustain the bull trout and westslope cutthroat that support fly angling. Unfragmented forest and alpine zones sustain the bighorn sheep, lynx, wolverine, marten, grizzly bear, and the last U.S. herd of mountain caribou that wildlife observers and photographers come to see. Long routes such as the Shedroof Divide and Grassy Top trails remain quiet because no motorized access penetrates the high country.