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Routes 13 & 14 - Fish Slough to Red Rock Canyon & Casa Diablo.


What to expect: Both routes are primarily on graded dirt roads; winter snows will close these routes. Route 13 includes a long passage of rough, narrow two-track roads—don’t take it if you are not experienced with 4WD. Map on pages 36-37.
Lengths: Route 13 is 33 miles; Route 14 is 67 miles.
Driving times: 3 hours for Route 13, 3 hours for Route 14.
Getting there: From Bishop at the intersection of U.S. 395 with U.S. 6 at the north end of town, go north 1.3 miles on U.S. 6 and turn left onto Five Bridges Road. Go another 2.3 miles to the intersection with Fish Slough Road—the start of both routes. Set your trip meter here. The directions, especially for Route 13, depend upon knowing your mileage.
Along the route: To your left is Chalk Bluff, the dramatic southern edge of the Volcanic Tableland. The incredibly violent explosion of Long Valley Caldera created the Tableland 760,000 years ago, blasting out 600 cubic kilometers of rhyolite lava and sending ash as far as Nebraska. Most of the lava poured across the landscape as a pyroclastic flow, a thick, fast-moving sheet of superheated ash. Chalk Bluff is the eroded edge of that flow.
Rising to your right as the pavement turns to dirt is the East Side Bluff. Since the Long Valley explosion, faulting has lifted the bluffs and dropped the land between. The lowland became a wetland, fed by springs whose waters spread to form Fish Slough. Behind East Side Bluff stand the White Mountains. White Mountain Peak, the high point on the horizon, at 14,249 feet is nearly the equal of 14,495-foot Mount Whitney, highest in the Lower 48 states.
At about 5 miles look left to see many prominent rounded or conical bumps. As the Long Valley pyroclastic flow cooled and fused into the white or pinkish rock called Bishop Tuff, hot water and steam fumaroles vented from beneath the surface and hardened the tuff around each vent. These harder mounds have resisted erosion to stand above the surrounding Tableland.
At 6.4 miles the wetland meets the road. Stop at the interpretive kiosk. This is the site of the Owens Valley Native Fish Sanctuary. The valley’s native fishes fared badly when water was diverted for agriculture and municipal use, and when larger, predatory fish were introduced for sport. The Owens pupfish was declared extinct in 1948 but, incredibly, was rediscovered in the 1960s in a small pool at Fish Slough. This sanctuary was established as part of the ongoing rescue effort but continues to be plagued by bass that devour the smaller natives. This is also the site of a stagecoach stop. A jump 150 years back in time would put you on the old stage route between the farm town of Bishop and the thriving Blind Spring silver mines. The kiosk here gives more information on Fish Slough’s history and natural wonders. Desert wetlands, being both rare and isolated, give rise to unique forms of life such as the Fish Slough milkvetch, a flowering plant found nowhere else in the world.
The road soon leaves the wetland and starts to climb. At 11 miles it drops into Chidago Canyon. On your right, protected by a fence, is an extraordinary petroglyph site. Archaeologists speculate about the purpose of these symbols painstakingly chipped into stone, but their meaning is yet to be fully deciphered: the Native Americans here at time of contact attributed them to an even more ancient people. We do know by the effort required to inscribe them that they must have been extremely important. Some theories hold that they were made as hunting magic or represent a symbolic map of the universe. More recent evidence suggests they were the work of shamans communicating with the spirit world.
At 17 miles, Fish Slough Road (3V01) intersects with 3S53 (look for the low brown signs). For Route 13 go left. For Route 14 go straight ahead.
Route 13, continued: Red Rock Canyon.
After turning left, continue to climb westward along this wide, graded road. At 19 miles the road narrows to a single vehicle’s width and squeezes its winding way between tall vertical walls of red, oddly-shaped rock. Take your time and watch for oncoming traffic! If there’s mud or snow, walk into the canyon to see if it will be passable before trying to drive through. The road emerges and re-enters narrow canyon sections a few times. Just as you leave the first narrow section, at about 19.2 miles, look to the right for a bas-relief carving of a miner swinging a pick-axe. This has been here as long as most local people can remember—no one seems to know who carved it, or when.
At 22 miles the road forks; take the left fork, signed “Chidago Canyon Road.” At 22.4 miles, “Chidago Loop,” take another left fork onto 4S34 and climb into the Benton Range, with fine views of the Sierra.
Turn left at 25 miles onto a narrower road numbered 4S41. This road soon becomes rough and climbs the north face of a steep hill—use 4WD. If the road is snowy at this point, don’t attempt to continue Route 13—it will become impassable as it climbs. Instead, continue on Chidago Canyon Road (4S34) to the Benton Crossing Road.
After the climb, you will crest a hill at 26.1 miles and be faced with a magnificent view of the White Mountains. Here, turn right where 4S41 continues and climbs to the south. At 26.9 miles, take the left fork; another left fork at 27.3; and a right fork at 28.2. Just after 28.8 miles you’ll be descending a very steep, rocky stretch—definitely a 4WD experience! At the bottom of the hill go left. A sheep bedding area, bare of vegetation, is on the right.
At 29.4 miles turn right. A little over half a mile farther, 4S41 meets the graded Casa Diablo Road where a sign with arrows indicates “Bishop 19.” Go left, toward Bishop.
Route 14, continued: Benton Hot Springs Fish Slough Road continues across the colorful Volcanic Tableland and at 20.7 miles meets a narrow, roughly paved road numbered 3V03. Go left onto the pavement and uphill. Take the first right turn onto a graded dirt road, at 22.1 miles: “Joe Main Road,” 3V02. At 22.8 miles turn right onto Yellowjacket Road (still numbered 3V02) and pass the small ranch at Yellowjacket Spring that was once a stagecoach stop. From here to Old Benton, Blind Spring Hill is on your right. A large body of silver ore was discovered within the hill in 1862; over the next 26 years its mines produced over $4,000,000 in silver. The Benton Range is to your left. The road crests a rise, crosses a cattle guard and drops toward Benton Hot Springs. The White Mountains will come into view again over the top of Blind Spring Hill. The high jagged peak at the north end of the range is Montgomery Peak. North of it is Boundary Peak—barely over the state line, it’s the highest point in Nevada.
At 28.5 miles the road becomes pavement as you enter the Benton Paiute reservation, and soon brings you into Benton Hot Springs. This was the largest town in Mono County during the heyday of the Blind Spring Mining District, with two newspapers, three breweries, and a lively rivalry with the silver mining town of Bodie. Some of the original stone buildings still remain; you can see the quarry they came from, a white scar on the hillside ahead. In the 1930s one family acquired what was left of the entire town and it began a new, quieter life as a ranch and resort.
Yellowjacket Road ends where it meets State Route 120 (not marked here) with a row of mailboxes at 29.7 miles. Turn left onto 120 and climb a hill of fantastically eroded granite. At 32.9 miles, after the road drops downhill, turn left onto the paved Benton Crossing Road which winds its way deep into the Benton Range. At 43.7 miles the road swings to the right around a windmill at the site of a sheep camp long used by Basque and South American herdsmen. Two miles farther, at 45.7, turn left onto a graded dirt road marked 3S02. A sign points to “Casa Diablo, Bishop.”
Road 3S02 will eventually join with Road 4S04. Continue on Casa Diablo Road, which heads in almost a straight southeast diagonal down across the sloping Tableland. Casa Diablo Mountain is the rocky-topped mound just ahead and to the left of the road. Casa Diablo, Spanish for “Devil House,” was an active gold mine in the early 1900s and the mining camp surrounding it even had electricity and telephone lines.
Here, high up on the Tableland, the views of the steep eastern face of the Sierra are spectacular. About three miles beyond Casa Diablo, a huge panorama suddenly opens up ahead with your route winding down through the middle of it: the lower parts of the Tableland; Fish Slough as seen from above; and the northern expanse of the Owens Valley.
In another four miles you can see to your right an area known as “Pink Cliffs,” for obvious reasons. Irregularities in the pyroclastic flow and subsequent faulting and erosion have made a Tableland that is not table-smooth but full of cliffs, crevices and canyons. Hawks and owls make good use of the vertical walls as nest sites and hunting perches, seeking the rabbits, rodents and reptiles that also make the Tableland their home.
For over 100 years, pack stations have used the Casa Diablo Road to drive their mules and horses up to the high country in the spring, and return in the fall—a tradition that continues today. Casa Diablo Road swoops down to Chalk Bluffs where it will drop you rather roughly off the edge of the Tableland and back to the start of your route.

Last updated: 04-27-2009