Grassy Top

Grassy Top is a 10,302-acre Inventoried Roadless Area in the Salmo–Priest country of the Selkirk Mountains, on the Colville National Forest east of Sullivan Lake. The high points are Grassy Top Mountain and Hall Mountain, joined by the timbered ridgeline that crosses Pass Creek Pass and drops into Conto Gulch. The area is the headwall of the Harvey Creek watershed (HUC12 170102160401): snowmelt and spring discharge feed Harvey Creek and its Middle and North forks, Pass Creek, the North and South forks of Granite Creek, Sullivan Creek, Hall Creek, Johns Creek, Last Chance Cabin Creek, Grease Creek, Gypo Creek, and Fetus Creek, all of which carry water down to Sullivan Lake and the Pend Oreille River. These are inland-rainforest streams: cold, shaded, and gravel-bedded.

The forest cover is the Inland Northwest version of a wet Pacific forest, found nowhere else in Washington outside this northeastern corner. The lower benches and shaded ravines carry Southern Rockies Mixed Conifer Forest with western hemlock (Tsuga heterophylla), western red-cedar (Thuja plicata), grand fir (Abies grandis), and Pacific yew (Taxus brevifolia, IUCN near threatened), over devil's-club (Oplopanax horridus), wild sarsaparilla (Aralia nudicaulis) — a disjunct relict of eastern hardwood flora — and single-flowered clintonia (Clintonia uniflora). Mid-slope, Rocky Mountain Wet Subalpine Spruce-Fir Forest takes hold with Engelmann spruce (Picea engelmannii), subalpine fir (Abies lasiocarpa), and IUCN near-threatened western white pine (Pinus monticola). The Hall and Grassy Top summits carry Northern Rockies Subalpine Woodland and Parkland, Subalpine Grassland, and Subalpine Meadow, with whitebark pine (Pinus albicaulis, IUCN endangered) at the upper edge. South-facing benches support Northern Rockies Ponderosa Pine Woodland and Western Larch Savanna. Avalanche chutes off Hall Mountain carry mountain maple (Acer glabrum) and Sitka mountain-ash (Sorbus sitchensis); riparian benches hold tealeaf willow (Salix planifolia) and mountain lady's-slipper (Cypripedium montanum, IUCN vulnerable).

Wildlife here reflects the area's northern Selkirk character. The Salmo-Priest country is among the last refuges in the contiguous United States for grizzly bear, Canada lynx, and North American wolverine, and Hall Mountain is well known for a transplanted bighorn sheep (Ovis canadensis) herd that uses its cliff bands. American marten (Martes americana), American pika (Ochotona princeps), and snowshoe hare (Lepus americanus) work the high country; moose (Alces alces), wapiti (Cervus canadensis), and white-tailed deer (Odocoileus virginianus) browse the avalanche-chute shrublands. Spruce grouse (Canachites canadensis) and dusky grouse (Dendragapus obscurus) hold the closed conifer interior; pileated woodpecker (Dryocopus pileatus) and northern pygmy-owl (Glaucidium gnoma) move through old-growth cedar-hemlock; western tanager (Piranga ludoviciana) and Swainson's thrush (Catharus ustulatus) sing from mid-canopy. Cold streams hold bull trout (Salvelinus confluentus); harlequin duck (Histrionicus histrionicus) and American dipper (Cinclus mexicanus) hunt the riffles, with Columbia spotted frog (Rana luteiventris) in beaver wetlands. Portions of this area fall within the potential range of several federally listed species; see the Conservation section for details.

A walker climbing from Sullivan Lake toward Hall Mountain passes from cedar-hemlock shade into Engelmann spruce within a single elevation band; near the summit the timber breaks open and Grassy Top's namesake meadows fall away across the divide. Pika calls echo from the cliff bands below, and the wind across Pass Creek Pass carries the smell of subalpine fir resin.

The high country east of Sullivan Lake — the country drained by Harvey Creek, Sullivan Creek, and the North and South forks of Granite Creek — is the ancestral homeland of the Kalispel people. Archaeological work at Sullivan Lake has established that Native peoples inhabited the area "as long ago as 8,000 to 11,000 years" [3]; the Forest Service estimates the earliest Indigenous hunters, fishers, and gatherers were here "around 9,000 years ago" [1]. The Kalispel "wintered on the east banks of the Pend Oreille River" [1], and "Kalispel means 'camas people,' and the tribe had territorial rights to some of the richest camas fields in the region" [1]. When U.S. expansion divided the tribe in the nineteenth century, "the Lower Kalispel — ancestors of today's tribal members — refused to abandon their ancestral lands and remained in the Pend Oreille region" [4], although "without the protection of a formal treaty, the Kalispel faced decades of struggle, losing access to vast portions of their homeland" [4].

Outside contact began in 1809, when the North West Company's David Thompson became the first non-Indian to enter the Pend Oreille Valley [1][3]. For nearly fifty years afterward the area saw only sporadic fur-trade activity. That changed in 1859, when "prospectors found gold in placer sediments between Sullivan Lake and the Pend Oreille River and in the river from Metaline Falls to past Z Canyon" [3]. Placer mining drew first white and then Chinese miners into the area; by the late 1870s "outcroppings of lead, zinc, and some silver had been discovered around the Metalines, bringing a new flood of prospectors" [3]. In 1887, George Linton's discoveries opened the area's first hard-rock mines [3]. The Sullivan Lake watershed itself became an early industrial site when Inland Portland Cement began work on the Sullivan Lake hydroelectric project in 1909 to power its new mill at Metaline Falls [3]. Pend Oreille County, in which the entire Grassy Top area lies, was carved from Stevens County by the Washington Legislature on June 10, 1911 [3].

Federal protection of the surrounding forest dates to the same period. The Colville Forest Reserve "was established by proclamation from President Theodore Roosevelt on March 1, 1907" [2], with its first headquarters in Republic. The Sullivan Lake and Newport districts — including the country that is now the Grassy Top Roadless Area — were originally part of the Kaniksu National Forest before joining the Colville [2]. The first Sullivan Lake District ranger, James McAbee, took office in 1907 [2]. The Forest Service's account of the Colville notes that loggers and ranchers worked the area heavily before the reserve was established, and only afterward did "rangers begin overseeing private resource harvest" [1].

Civilian Conservation Corps crews transformed the area's infrastructure in the 1930s. The Sullivan Lake Ranger Station itself is a CCC building, as are many of the fire lookouts on the Colville [1]. The 10,302-acre Grassy Top area, in the Sullivan Lake Ranger District, is protected today under the 2001 Roadless Area Conservation Rule.

Vital Resources Protected

• Cold Headwater Stream Integrity: The 10,302-acre roadless area sits at the head of the Harvey Creek watershed (HUC12 170102160401), where Harvey Creek and its Middle and North forks, the North and South forks of Granite Creek, Pass Creek, Sullivan Creek, Hall Creek, and a series of smaller springs originate from snowfields on Hall and Grassy Top mountains. Without road crossings or cut slopes to deliver chronic sediment, these channels retain shaded canopy from Northern Rockies Foothill Streamside Woodland and Rocky Mountain Subalpine Streamside Woodland, cold temperatures, and the gravel-bedded structure that ESA-threatened bull trout require for spawning. The same protection sustains the cold-water input that keeps Sullivan Lake itself usable for native fish and harlequin duck broods.
• Inland Rainforest Old-Growth Structure: The Southern Rockies Mixed Conifer Forest on the lower benches carries western red-cedar, western hemlock, Pacific yew (IUCN near threatened), and disjunct relict species — wild sarsaparilla and Hooker's mandarin — that occur in Washington only in this northeastern corner. Roadlessness preserves the closed canopy, deep coarse woody debris, and continuous understory moisture that support pileated woodpecker, American marten, and the mosses and forest-floor lichens this community depends on. Once fragmented, this inland-rainforest structure does not regrow on managed forest rotations.
• Climate Refugia and Carnivore Connectivity for the Salmo–Priest: Grassy Top sits in the southern half of the Salmo–Priest ecosystem, one of the last linkages in the contiguous U.S. for grizzly bear, Canada lynx, North American wolverine, and the Southern Mountain Caribou DPS. The continuous elevational gradient from cedar-hemlock at Sullivan Lake up through Engelmann spruce-subalpine fir to whitebark pine parkland on Grassy Top and Hall provides climate-refugia movement habitat for all four species. The Hall Mountain bighorn sheep herd uses the same roadless cliff bands. Roadlessness keeps these animal movement corridors functional across an international border.

Potential Effects of Road Construction

• Sedimentation and Loss of Bull Trout Spawning Habitat: Cut-and-fill grading on the steep glaciated slopes above Harvey Creek and Granite Creek delivers fine sediment directly into the channels through surface erosion, slope failure, and undercut culverts. Once embedded, fine sediment smothers spawning gravels, fills interstitial pore space, and reduces oxygen flow to bull trout eggs — an impairment that persists for decades because high-gradient mountain streams have limited capacity to flush fines. Loss of streamside canopy from clearing also elevates summer water temperatures above the cold-water threshold this species requires.
• Fragmentation of Carnivore Movement and Caribou Habitat: Roads function as filters and barriers for wide-ranging carnivores. Grizzly bear and wolverine consistently avoid road corridors and human disturbance; lynx and mountain caribou are particularly sensitive to snowmobile compaction on plowed or graded surfaces, which creates packed routes that allow competing coyotes and cougars into deep-snow refugia. Roading the Grassy Top–Hall ridgeline would sever the corridor that links the U.S. Salmo–Priest population to recovery habitat in British Columbia, with no practical mitigation available once the corridor is broken.
• Invasion of Inland Rainforest Understory by Disturbance-Adapted Species: Spotted knapweed, oxeye daisy, common St. John's-wort, and Dalmatian toadflax — all documented on the Colville National Forest's road network — colonize disturbed roadside cuts and spread into adjacent forest along human and equipment paths. Road construction through Southern Rockies Mixed Conifer Forest exposes shaded interior cedar-hemlock to wind, light, and seed input that the closed canopy had previously excluded. Mountain lady's-slipper, white bog orchid, and the relict forest-floor flora cannot tolerate the resulting microclimate change, and once these communities convert, the disjunct inland-rainforest character that defines Grassy Top is permanently lost.

The 10,302-acre Grassy Top Roadless Area lies in the Selkirk Mountains east of Sullivan Lake, on the Colville National Forest's Sullivan Lake Ranger District. Six verified trailheads ring the area: Grassy Top–Pass Creek Pass and Grassy Top–North Fork Harvey on the north and east, Hall Mountain on the southeast, Noisy Creek at the south end of Sullivan Lake, and Lakeshore North and Lakeshore South on the lake itself. The defining route is the Grassy Top Trail (503), an 8.0-mile horse-and-hiker traverse along the divide. From the Hall Mountain Trailhead, the Hall Mountain–Grassy Top connector (533) climbs 4.9 miles to link the two summit lines, while the shorter Hall Mountain Trail (540) provides a 2.6-mile hiker route to the bighorn-sheep country on Hall's south face. The North Fork Grassy Top Trail (379) drops 6.3 miles down the drainage of the same name. The Sullivan Lake Trail (504) follows the east shore 4.4 miles between Lakeshore North and Lakeshore South, and the Noisy Creek Trail (588) climbs 5.2 miles from the lake into the south flank of the roadless area. The Noisy Creek Campground Trail (588A) is a 0.1-mile accessible spur. Most trails are surfaced in native material; the Noisy Creek Campground spur uses imported compacted material.

Four Forest Service campgrounds anchor the south end of Sullivan Lake just outside the roadless boundary — East Sullivan, West Sullivan, Sullivan Lake Group, and Noisy Creek — and supply the practical base for foot and stock trips into the interior.

Anglers fish Sullivan Lake itself and the streams that drain into it. Sullivan Creek, Harvey Creek and its forks, Granite Creek's North and South forks, Pass Creek, Hall Creek, Johns Creek, and Last Chance Cabin Creek hold the cold-water salmonids that the Forest Service classifies as good-to-excellent habitat for bull trout (Salvelinus confluentus) — catch-and-release where present — along with native longnose sucker (Catostomus catostomus) and redside shiner (Richardsonius balteatus). A current Washington fishing license is required, and bull trout regulations apply.

Hunters use the area for some of the most productive Selkirk big-game ground in the state. White-tailed deer (Odocoileus virginianus), mule deer (Odocoileus hemionus), Rocky Mountain elk (Cervus canadensis), and moose (Alces alces) hold the avalanche-chute shrublands and meadows; the Hall Mountain bighorn sheep (Ovis canadensis) herd is managed under a permit-only hunt. American black bear are present. Grizzly bear (Ursus arctos horribilis) and gray wolf (Canis lupus) occur in the same country and are not hunted. WDFW game-management-unit rules and harvest reporting apply.

Bird observers post checklists at eight eBird hotspots within 24 km, with Sullivan Lake (149 species, 202 checklists) and Sullivan Lake–Noisy Creek (136 species, 252 checklists) the most active, joined by Bunchgrass Meadows (119 species), Salmo Pass (104 species), and Salmo Mountain (83 species). Harlequin duck (Histrionicus histrionicus) and Barrow's goldeneye (Bucephala islandica) winter on the creeks; common loon (Gavia immer) and trumpeter swan (Cygnus buccinator) use Sullivan Lake. The closed inland-rainforest canopy holds pileated woodpecker (Dryocopus pileatus), northern pygmy-owl (Glaucidium gnoma), Pacific wren (Troglodytes pacificus), and varied thrush; subalpine country at Grassy Top supports Clark's nutcracker (Nucifraga columbiana), pine grosbeak (Pinicola enucleator), and spruce grouse (Canachites canadensis). American dipper (Cinclus mexicanus) hunts the riffles of Sullivan Creek.

Photographers work the bighorn-sheep country on Hall Mountain at first light and the long ridge views from Grassy Top across to Salmo Mountain and into British Columbia. Stock parties find the Pass Creek Pass approach the easiest entry for multi-day trips.

Every activity here depends on the roadless condition. There is no motorized access to the divide, no road crossing of Harvey Creek, Granite Creek, or the upper Sullivan Creek tributaries, and no shortcut to the Hall–Grassy Top ridge. Maintaining that arrangement is what keeps the bull trout reproducing in the headwaters, the Hall Mountain bighorn herd on intact range, the inland-rainforest birds in unfragmented canopy, and the U.S.–British Columbia carnivore corridor functional across the divide.