Pine Creek to Death Hollow
The road rounds a wide bend then straightens, following the uppermost section of the valley alongside a sagebrush plain, before climbing more steadily, now through full-size pine woods. Posey Lake Road forks off westwards, while the main route comes more winding as it approaches the Upper Box trailhead. Just before is the
Blue Spring Trail (1.4 miles), a connecting path to the Great Western Trail, while just after is a northwards side road to
Blue Spruce Campground. More climbing takes the road rounded the divide separating the Pine Creek drainage from the next big canyon, Death Hollow, which is much deeper, though still accessible to hiking, from a signed trailhead near its upper end. The are several dramatic vistas of cliffs and pinnacles before the road crosses a cattle grid in the middle of a narrow neck of land, and turns south, running along the Hell's Backbone ridge. Just before the cattegrid a short track branches northwards to the 1.7 mile
Rogers Peak Trail, another link to the Great Western Trail, crossing the eastern slopes of the eponymous peak, though not coming anywhere near its 10,127 foot summit. At its narrowest point, the Hell's Backbone ridgeline is interrupted by a short but deep crevasse, spanned by a 100 foot long concrete bridge, the third at the site, the original wooden bridge having endured until the 1960s. The road is paved for about 1000 feet either side of the bridge, beside which is a pull-out, information board and viewpoint.
Hell's Backbone to Hwy 12
Continuing east, the road descends steeply, around several tight bends, down into the much gentler canyon of
Sand Creek, which although trailless, can be followed, with moderate difficulty, by a combination of wading the stream and walking on bushy benches. On the far side of the creek, the road climbs once more, for the last time, passes over a saddle, then becomes generally flatter and straighter, with more side tracks, and increasing signs of cattle. It crosses
Sweetwater Creek, another small but permanent stream, and follows its shallow valley to the south, emerging after a couple of miles to a wider valley with scattered farms and houses. The final few miles are paved, as the road crosses arid, more desert-like terrain, over one more significant drainage (
Big Hollow), and onto the intersection with Hwy 12, 3 miles from Boulder. Just before is a little side road that crosses an airfield to the north end of the
Boulder Mail Trail.