It was a little past 3:00 in the afternoon when I passed this straight-backed wooden chair along an Ahmanson Ranch trail. The Tempe thermometer clipped to my pack read over 100 degrees.
It gets REALLY hot at Ahmanson Ranch (Upper Las Virgenes Canyon Open Space Preserve). In the direct sun the temperature can be 10°F-15°F hotter than in the shade, and there is very little shade at Ahmanson. In-the-sun temperatures of 100°F or more are common in the Summer but can occur just about any time of the year.
There are two weather stations I use to get an idea of the weather conditions at Ahmanson Ranch — the Cheeseboro RAWS and Valley Circle Estates Weather Underground station. Weather station thermometers are usually shielded from the direct sun by a white, ventilated enclosure. The Cheeseboro RAWS includes a measurement of the “Fuel Temperature.” This is generally a better indication of the temperature experienced by a runner, hiker, or rider in the direct sun.
Update on July 29, 2023. Rounding the temperature to whole degrees, my West Hills weather station recorded a high of 100°F, or higher, for 15 consecutive days this July (7/13/23 to 7/27/23). The station is about three miles from the Victory Trailhead at Ahmanson Ranch.
WARNING: The North and Northeast Ridges of Lone Pine Peak are long, complex, alpine climbing routes. Many people climb them without issue, but some are forced to retreat, bivi, or have other difficulties. Some have problems finding the descent routes. Depending on your mountaineering and rock climbing skills, the weather, and your judgement, these climbs can be a fantastic experience or an epic nightmare.
The soaring knife-edge ridges and sweeping granite faces of Lone Pine Peak are compelling features that mountaineers and rock climbers find irresistible. The North Ridge — the right skyline of the peak when viewed from the Owens Valley — is the most popular climbing route on the mountain. It was first climbed in September 1952 by A. C. Lembeck and Ray W. Van Aken. In the 1954 edition of the Climber’s Guide to the High Sierra, it was described as a long class 5 route requiring six pitons.
What’s old is new again, and with the rapid evolution of climbing in the ’70s, the North Ridge was rediscovered. I think I first heard about an “amazing ridge” on Lone Pine Peak out at Stoney Point. There was a group of us that bouldered at Stoney on Tuesday and Thursday and then climbed at Tahquitz, Suicide or JT on weekends. Periodic multi-day trips to the Needles, Yosemite, Tuolumne, and the Sierra rounded out our climbing routine.
Phil Warrender and I, along with other climbing partners, climbed the North Ridge many times. We’d drive up from L.A. after work, sleep at Whitney Portal, and would climb the ridge the following day. I don’t think I climbed the North Ridge by the same route twice. That was part of its attraction.
Because we were familiar with the approach and descent, climbed the ridge without a rope, usually didn’t have route-finding issues, and ran down most of the Meysan Lakes Trail, we were able to do the North Ridge comfortably in a day. Starting at the Portal 6:00 a.m., we typically made it back in the mid to late afternoon.
You can’t climb the North Ridge or look at Lone Pine Peak from the Owens Valley, and not think about climbing the Northeast Ridge. To our climbing eyes, the Northeast Ridge looked like it was going to be more difficult than the North Ridge. The Northeast Ridge looked sharper and the towers more dramatic. And, it looked like the ridge ended at a headwall.
Whether it was the perceived difficulty and the strenuous approach — or just random chance — nearly 30 years after the first ascent of the North Ridge, there was no record of the Northeast Ridge having been climbed.
Phil and I did a lot of rock climbing and mountaineering in 1982. That June, along with Rich Grigsby, we climbed Whitney Portal Buttress. Lone Pine Peak was across the canyon, and I think that’s when we decided we had to get on the Northeast Ridge as soon as possible. We scouted the approach and waited for the snow higher on the ridge to melt.
To give ourselves the most daylight for dealing with possible problems on the technical part of the ridge, we decided to hike the non-technical section in the afternoon, then bivi and start climbing early the next morning. One downside of this decision was that it was July, and we did the hike during the hottest part of the day.
To save weight we carried a minimum of “just in case” climbing gear. We took the good half of an 8 mm rope that had been damaged. We packed “swami belts” instead of climbing harnesses. The webbing was much lighter and more compact, and might come in handy if we had a problem. We took a few slings and maybe a nut or two. In a pinch we figured we could use natural protection or chock some appropriately shaped rocks. We hiked and climbed in approach shoes. Phil’s shoes were Nike Lava Domes. I don’t recall what shoes I used, but I do remember that the soles started to delaminate during the climb.
We each took a couple bottles of water. We thought there was a slight chance of finding an accessible patch of snow higher on the route, but that didn’t happen. There was a little snow in the gully between the Northeast and North Ridges.
We both carried (film) cameras. My camera (and maybe Phil’s) was a Pentax ME. At that time, I was shooting a lot of B/W film – rolling my own cartridges from a bulk roll of fine-grained 2415 Tech Pan film and developing it myself.
The climb could not have gone more smoothly. It was a granite playground of ramps, towers, and feldspar dikes and crystals. Everything that looked like it might be a problem had a solution. My notes regarding the route were pretty sparse:
“Ramp on right of first major tower. Followed a dike on another. Traverse on shattered ledge/weakness on final headwall.”
We never used the rope or any of the climbing gear. There were a few bouldering-type moves, but overall the climbing was surprisingly straightforward. The rock quality was generally good. The granite is peppered with large feldspar phenocrysts. These can make great holds, but can also pop unexpectedly.
Judging from the sun’s angle and shadows, it was around noon when I took this last photo high on the ridge. That would have put us on top about 1:00 p.m. It may have been earlier. Low on water, we briefly visited Lone Pine Peak’s summit, and then hiked south to the usual descent chute on the west side of the peak.
Hurrying down the scree, we thirstily drank from the first little stream we encountered. After rinsing off the granite grime at a nearby tarn, we found the Meysan Lakes Trail, and headed back to the Portal.
Above are thumbnails of a few photos from a 20-mile out and back trail run to Mugu Peak from the Wendy Drive Trailhead. The run was on October 17, 2020. Click on an image for a larger photo and more information.
There are several ways to get to Mugu Peak from the Wendy Drive Trailhead on Potrero Road. When I do this run I’m usually looking to do a longer, faster-paced run without a huge amount of elevation gain. That translates to running down Big Sycamore Canyon to Wood Ranch Road and then either running up the Backbone Trail or Hell Hill to the “hub,” and from there to La Jolla Valley and Mugu Peak.
Following a December with twice normal rainfall, Downtown Los Angeles (USC) experienced the fourth driest January-February on record. Now it seems the spigot has been turned back on, and March rainfall for L.A. might very well be above normal.
As of 3:00 p.m. today, March 13, Downtown Los Angeles (USC) has recorded 2.05 inches of rain this March, boosting the rain year total (since July 1) to 9.40 inches. This is about 75% of normal for the date.
More rain is forecast over the next week or so, but the major weather models differ on the projected amounts. To make up for the January-February rainfall deficit and finish the rain year close to 100% of normal, Los Angeles needs another 5.5 inches of rain by June 30.
Not impossible, given some of the forecasts, but that would be a lot of rain for this time of year. Well see!
Update July 6, 2020. Remarkably, Downtown Los Angeles (USC) ended the rain year, July 1 to June 30, within 0.07 inch of normal rainfall. It was a tumultuous rain season that saw copious rainfall in December, and then almost none in January and February — usually the wettest months of the year. Just when we started to think “drought,” the wet weather returned. Combined, Match and April precipitation was 221% of normal. That and a little rain in May brought the Los Angeles rain year total up to 14.86 inches, just short of the normal of 14.93 inches.
Update April 12, 2020. Over six consecutive days, from April 5 to April 10, Downtown Los Angeles (USC) recorded 2.96 inches of rain. This is about 325% of the normal amount for the whole month. The precipitation totals of 14.66 inches for the rain year and 14.63 inches for the water year are now above normal for the date and within about one-third of an inch of the normal annual rainfall for Downtown Los Angeles.
Update April 10, 2020. April rainfall picked up right where March left off. As of April 9, Downtown Los Angeles (USC) has recorded 2.80 inches of rain this month. This is more than three times the normal amount of rain for the entire month of April. This brings the rain year and water year totals to 14.50 and 14.47 inches, respectively. For the first time since February 1 the rainfall totals for Los Angeles are above normal for the date. Los Angeles is now within a few tenths of an inch of normal rainfall for the year, and it is still raining today.
Update March 24, 2020. On March 22, Downtown Los Angeles (USC) set a new rainfall record for the date of 1.51 inches. As of March 24, Downtown Los Angeles has recorded 4.35 inches of rain this month. This is 179% of the normal amount of rain in March. The current rain year/water year total of 11.70/11.67 inches is about 88%/90% of normal for the date. The magic number for 100% of normal rainfall is 14.93 inches — either by June 30 (Rain Year) or September 30 (Water Year).
Update March 17, 2020. As of March 16, Downtown Los Angeles (USC) has recorded 2.80 inches of rain this month. This already exceeds the normal amount of rainfall for the entire month of March, which is 2.43 inches. The current rain year/water year total of 10.15/10.12 inches is about 79%/81% of normal for the date.