From the intersection with Main Street in Quartzsite, Arizona, drive south on Highway 95 for 31.0 kilometres and turn left (east) onto Palm Canyon Road (2WD gravel).  Drive 5.4 kilometres and turn left onto a rougher road (high-clearance vehicle strongly recommended).  Drive 1.1 kilometres and veer right (east) onto Kofa Queen Canyon Road.  Drive 6.3 kilometres and pass a dispersed camping area.  The road enters the canyon here and becomes rougher.  Drive 3.6 kilometres and pass Skull Rock.  Drive another 1.1 kilometres to reach a turnaround loop and the unsigned trailhead for Signal Peak.  Park here without blocking the road.  Total distance from Highway 95 is 17.5 kilometres; it took us well over an hour to drive to the trailhead after leaving pavement.

With the long and stressful drive to the trailhead behind us, Zosia and I were grateful to find a good trail to follow into Ten Ewe Canyon.  After an initial flat section, the trail gains elevation in earnest and veers right into Indian Canyon.  We briefly lost the trail at one point but picked it up again after a short scramble up an easy rock band.  We then passed a prominent pinnacle before reaching a saddle where we took a short break.  From the saddle, the trail dips slightly before rising steadily through a gap at the upper end of the canyon.  Cairns were helpful for navigating a few sections where the trail disappears among boulders and also in the draw above the gap.  Climbing out of the draw, we had no further issues following the trail the rest of the way to the top.  There are actually two separate summits of roughly equal height, and we made a point of tagging both before descending the mountain.

For our return trip, Zosia and I basically backtracked the same way.  While descending the draw, we were surprised to see another hiker, but he was completely off-route and scrambling up increasingly technical terrain.  We pointed him in the right direction before resuming our descent.  I inadvertently stepped on a cholla cactus at the saddle, but otherwise, we had no issues following the same trail all the way down the mountain.  Astonishingly, the hiker we bumped into higher up returned to the trailhead only a few minutes after us.  He told us that, after tagging the summit, he basically ran the whole way down the mountain.

On our drive out, Zosia and I made a brief stop to visit Skull Rock where we chatted with an older couple who were camping right in front of the striking rock feature.  Though long and bumpy, the remaining drive out was uneventful, and we subsequently proceeded to a truck stop to grab a much-needed shower.  Finding a nice Christmas dinner afterward proved to be the most challenging adventure of the day (we ultimately had to settle for a Del Taco in the declining city of Blythe, California).

	The drive to the trailhead is long and very bumpy. Photo courtesy of Zosia Zgolak
	In this view from near the trailhead, the route ultimately climbs up to the right of Ten Ewe Mountain (centre).
	Zosia gains elevation quickly on a good trail.
	The trail eventually goes under the pinnacle at right.
	Zosia reaches the base of the aforementioned pinnacle.

Here is a look back at the approach valley and the many unnamed ridges within Kofa National Wildlife Refuge.

 

	From this saddle, the route heads through the gap at centre.
	The route goes over some slabs in the gap and will turn to the right underneath the peak at centre.
	Sonny has climbed up from the gap at bottom right. Photo courtesy of Zosia Zgolak
	Zosia approaches the summit block of Signal Peak.
	Sonny and Zosia stand on the summit of Signal Peak (1482 metres).

Here is the view to the southwest from the summit.

 

	The road to Palm Canyon can be seen in this view to the west.
	Zosia heads for the north summit of Signal Peak.

In this view to the southeast from Signal Peak's north summit, the striking pinnacle at right is known as Summit Peak South (officially-named Summit Peak is the lower bump to the left of the pinnacle).

 

	Zosia signs the register on the north summit (1482 metres).
	This is looking back at the gazetted (south) summit of Signal Peak from the north summit.
	Zosia heads back down to the gap (lower left) with Ten Ewe Mountain dominating the background.
	Sonny pulls out, with difficulty, some cholla cactus spines stuck in his boot sole. Photo courtesy of Zosia Zgolak
	Zosia is back on easier ground as she makes her way out of the canyon.
	On the drive out, Sonny stops to check out Skull Rock. Photo courtesy of Zosia Zgolak
	Here is a last look at Signal Peak from the desert flats to the west.
	Total Distance:  6.4 kilometres Round-Trip Time:  5 hours 12 minutes Net Elevation Gain:  616 metres GPX Data