Nights are beautiful in the desert and with daytime temperatures getting hotter it becomes a particularly lovely time to get outside.
Hiking at night has its own challenges – just like any hike be mindful of your knowledge, skills and fitness – going with people that have experience hiking at night and familiarity with the area you want to explore is an excellent idea.
I don’t ever remember noticing the trail sign at the start of the Molino Basin Trail – still standing, but nicely overgrown and no longer actually on the trail, probably the victim of past changes to the Molino Basin Parking Area – I wonder if the signs enjoys its retirement off the beaten path… 🙂
The pictures above are from Catalina State Park but Doug Kreutz’s recent article Saguaros on a blooming binge in Sabino Canyon still seems relevant – and on the subject of Saguaros perhaps some photographic inspiration from Jack Dykinga…
I was recently reminded of John V. Bezy’s A Guide to the Geology of Catalina State Park and the Western Santa Catalina Mountains (available as a free PDF file) – the guide is accessible to readers without any formal training in geology and has been interesting to read again because it contains information on so many familiar sights. From a section titled Granite Pinnacles (p.15):
Catalina State Park is best known for the dramatic granite pinnacles that have developed in the upper, cliff-forming unit of the Wilderness Suite granite in this part of the Santa Catalina Mountains. These towering spires are the products of surface weathering and erosion by running water guided by deep joints in the rock.
The Wilderness Suite granite differs from the Oracle and Catalina granites that make up the western face of the range in that it is dominated by widely spaced, vertical joints. These fractures serve as avenues along which chemical and physical weathering and erosion penetrate the granite. Rock shattering, caused by ice expansion, wedging by plant roots, and chemical decomposition, enlarges the joints. Water from rain and snowmelt is channeled into the joints, cutting them into ravines and canyons. Joints actually control the location of most streams crossing bedrock. This concentrated action of weathering and erosion eventually widens and deepens the ravines and canyons, leaving the massive granite in between standing as towering pinnacles.
A Guide to the Geology of Catalina State Park and the Western Santa Catalina Mountains – p.10:
The bedrock of this part of the Santa Catalina Mountains is mainly the Oracle, Catalina, and Wilderness Suite granites. These granites were injected deep within the Earth’s crust as great molten masses. They were emplaced at different times: the Oracle Granite 1.45 billion years ago, and the Wilderness Suite Granite 45-50 million years ago, and the Catalina Granite 26 million years ago. The molten rock, which cooled and solidified over millions of years and miles below the Earth’s surface, has since been exposed by erosion.
The drive up to San Pedro Vista was slightly slower than normal – both because I couldn’t resist stopping and photographing Saguaros near the highway and because a film crew was set up at Windy Point filling part of the parking lot with trailers and vehicles and occasionally stopping traffic. I didn’t see what they were filming – but the motorcycles in a pop-up tent and drone hovering off the side of the highway on my way down did make me a bit curious…
From San Pedro Vista I intended to take the Incinerator Ridge Trail and Kellogg Trail up to Mount Bigelow – my idea was a good workout with great views – but the views quickly won out over the workout – I sat on the top of Barnum Rock and watched the sun and clouds create shapes of light and shadow on Green and Guthrie Mountains and then admired Kellogg Mountain, Mount Bigelow and the San Pedro Valley from Leopold Point.
The Mount Lemmon Skycenter Facebook page recently featured a number of images of the recent transit of Mercury across the sun – a number of them were collected by Tucson News Now in Mercury images from Mt. Lemmon SkyCenter.
Rider Carol Fontana and her horse Tiki passed thru the Santa Catalina Mountains in May as part of their thru-ride of the Arizona Trail – see more about their journey on SaddleUpAz. The ride is to support and raise awareness of the Prescott Area Shelter Services whose mission is “serve homeless women, families, and veterans by providing temporary shelter, resources, individualized case management, and a pathway to permanent housing.”
Bighorns spotted, photographed, on Pontatoc Ridge – Arizona Daily Star: A local hiker had a great encounter with two Bighorn Sheep on the Pontatoc Ridge Trail!
With the Bighorn Sheep Closure over for the year we took advantage of a not-too-hot day to wander out of Catalina State Park and into Romero Canyon, just inside the Pusch Ridge Wilderness. Romero Canyon was completely dry in some places while other spots had trickling flow and pools of water.
Near the mouth of Romero Canyon there is an brief, but fascinating, section of canyon where canyon walls of an unusual rock close in tightly. This section of canyon is just below the prominent green colored Breccia Hill and the rock is mentioned in A Guide to the Geology of Catalina State Park and the Western Santa Catalina Mountains (p. 29):
Tremendous friction is generated as fault surfaces slide together. This grinding action produced a zone of powdered rock (fault gouge) and highly broken rock (fault breccia) that can be observed here at Breccia Hill and at other locations where the Cañada del Oro has exposed the fault surface … Movement on the Pirate Fault is thought to have occurred six to twelve million years ago. This demonstrates how an ancient geologic structure, in this case a fault, can control modern landscapes.