Temperatures in early October have been far above seasonal at mid elevations, more typical of midsummer conditions, and are expected to remain that way until Saturday 10th. A brief if dramatic cooling is forecast for 11th-13th October, as some cloud, strong south-west winds, and the possibility of light precipitation may accompany the dissipation of Tropical Storm (currently Hurricane) Rachel far offshore to our south-west.
In contrast, temperatures at the highest elevations now feel distinctly autumnal, especially on the breeziest days – see my observations from San Jacinto Peak in the Weather section below – but have actually been averaging above seasonal, a trend tentatively forecast to continue for much of October (other than a marked cooling on 11th-12th).
Despite moderate tropical rains in early September, water flows have largely returned to their late August levels (sample photos below). At this time main springs and creeks largely continue to flow, albeit weakly. Ephemeral sources are dry, while “perennial” water sources remain at low flow rates for the time of year. Key sources such as the pipe in Round Valley (flow rate 1.0 L/min on 3rd October), the North Fork crossing of Deer Springs Trail (3.0 L/min on 28th), and the creek in Little Round Valley, are flowing. Wellman’s Cienega is flowing weakly, especially from mid morning onwards (flow rate 1.5L/min at dawn, 0.5L/min by late morning on 5th October). The Deer Springs crossing at PCT Mile 185.4 is dry.
Water is flowing weakly but reliably in Tahquitz Creek near its source at PCT Mile 177 and again further downstream at the north end of Little Tahquitz Meadow (although it is dry between those two locations). Strawberry Cienega is dry. Willow Creek is now dry where it is crossed by Willow Creek Trail but there is gentle flow immediately upstream; it is also just flowing further downstream where it is crossed by the so-called King Trail (discussed below). Middle Spring on Devil’s Slide Trail is now dry for hikers, but I continue to maintain a tiny pool suitable for thirsty dogs and wildlife. The North Fork of the San Jacinto River is dry where it crosses Seven Pines Trail and further downstream where it crosses Dark Canyon Road. On the Desert Divide, Live Oak Spring is flowing weakly, but both Cedar and Apache springs are no longer reliable.
Be rattlesnake aware. Observations have become less frequent with temperatures generally cooling, but sun-exposed areas (especially below 8000 ft) such as Devil’s Slide Trail, South Ridge Trail, lower Deer Springs and lower Marion Mountain trails, and around Suicide Rock, continue to record rattlesnakes on warm days in early October. Above about 5000 ft elevation, the venom of Southern Pacific Rattlesnakes (Crotalus oreganus helleri) in the San Jacinto mountains is predominantly neurotoxic, almost always fatal for dogs and sometimes for humans (see my long read article linked here for further information describing the unprecedented survival of our dog Anabel after a July 2020 neurotoxic bite).
Be bear aware. Although rarely reported, up to six individually identifiable Black Bears have been observed in the San Jacinto mountains in the past decade. Of these, one with an ear tag has been here since 2017 and was seen repeatedly in 2025 (see, for example, my video from 14th September 2025 linked here). Another individual was fitted with a satellite collar in April 2026, and in just one month ranged widely from 8500 ft on the north side of San Jacinto Peak south into the Santa Rosa Mountains (per CDFW). There have been no reports of negative interactions with humans in the high country, at or near wilderness campsites, or on trails.
Dark Canyon campground did not reopen in 2026 due to staffing/budget issues, although Dark Canyon Road (the access to Seven Pines trailhead) has remained open all year. Following superficial grading late last year, Black Mountain Road (4S01) is in slightly better condition than in 2025, but remains far rougher than in June 2020, the last time it was comprehensively graded. South Ridge Road is in poor condition (although not as bad as 2019) and generally requires a high clearance and/or AWD/4WD vehicle to reach the South Ridge trailhead at the top of the road.
Daily survey hikes by the Trail Report year-round in the San Jacinto mountains include multiple routes to the highest peaks including San Jacinto Peak typically 2-3 times per week (but almost daily during and following storm conditions), Tahquitz Peak and area at least once per week, plus a wide variety of other trails on intervening days.
WEATHER
After persistently hot weather in July and August, cooler conditions prevailed from 30th August into early September. Temperatures were around seasonal for the first few days of September, before rising yet again to above average. Tropical Storm (briefly Hurricane) Marie tracking offshore far to the south-west of our region generated moderate rainfall on 6th September. Drizzle on 7th then turned into a dramatic but brief thunderstorm with heavy hail in the high country on Tuesday 8th. This moisture, while still very much tropical in origin, was not directly associated with Marie, but was being drawn north directly from Baja.
Dry, mild weather continued for much of September, until some localized thunderstorms on 24th as described in the previous Report. With the exception of further brief cooling on 27th-29th, temperatures for the remainder of September and throughout the first week of October have been well above seasonal. Cool temperatures are forecast for 11th-13th October as the dissipation of Tropical Storm (currently Hurricane) Rachel may draw strong south-westerly winds across Southern California, with chances for cloud and possibly even a little precipitation. Currently there is no significant precipitation forecast for this region from the several hurricanes/tropical storms active in the eastern Pacific to our south and south-west.
At San Jacinto Peak (10,809 ft/3295 m) on Monday 5th October 2026 at 0810 the air temperature was 46.7°F (8°C), with a windchill temperature of 35.6°F (2°C), 82% relative humidity, and a cool ESE wind sustained at 11 mph gusting to 17.9 mph.
At the Peak on Friday 2nd October 2026 at 0845 the air temperature was 48.9°F (9°C), with a windchill temperature of 37.2°F (3°C), 54% relative humidity, and a steady ESE wind sustained at 17 mph gusting to 25.3 mph.
At the Peak on Wednesday 30th September 2026 at 0640 the air temperature was 38.8°F (4°C), with a windchill temperature of 27.9°F (-2°C), 64% relative humidity, and a fresh due North wind sustained at 8 mph gusting to 16.2 mph.
At the Peak on Tuesday 29th September 2026 at 0940 the air temperature was 42.9°F (6°C), with a windchill temperature of 34.5°F (1°C), 66% relative humidity, and a very light NNW wind sustained at 2 mph gusting to 5.2 mph.
At the Peak on Monday 28th September 2026 at 0810 the air temperature was 38.8°F (4°C), with a windchill temperature of 24.1°F (-5°C), 100% relative humidity, and a chilly WSW wind sustained at 14 mph gusting to 24.0 mph.
TRAIL CONDITIONS
Current water conditions are summarized in the paragraphs in the introduction above.
Significant sections of the Pacific Crest Trail in the San Jacinto mountains, although largely clear of blowdowns, remain in urgent need of brushing despite repeated reporting to USFS and PCTA. This includes Miles 155-157, 169-170 (Apache Peak area), 171-173, 179-183 (Saddle Junction to Strawberry Junction), and 185.5-190 (Fuller Ridge).
The first comprehensive trail trimming in decades is being undertaken by the Trail Report this year on the upper Peak Trail. About 90% of the 0.5 mile section of trail between 10,000 ft and the Miller Peak switchback had been widened to 2-4 feet by early October. Unmanaged chinquapin overgrowth had narrowed the trail to just 10-15 inches wide in many places, which was problematic year-round for pole users but especially in winter conditions (example before-and-after photos in most prior reports since June).
Deer Springs Trail from the trailhead to Little Round Valley was cleared of the handful of blowdowns from last winter by the Trail Report.
Trail maintenance work by USFS and State Park volunteers earlier this year cleared Willow Creek Trail of blowdowns from last winter. Brush trimming work was undertaken on both the USFS and State Park sections of the trail in late July, although it was much more limited on the State Park section, and the upper switchbacks closer to Hidden Divide remain badly overgrown in places.
The Caramba Trail from near Reeds Meadow through Laws Camp and on to Caramba, and the Cedar Trail from Willow Creek Trail to Laws, are euphemistically (and perhaps dangerously) described by the Forest Service as “not maintained”. In reality both trails have been abandoned for more than a decade and no longer exist. They are so heavily overgrown, largely with dense whitethorn which obscures several hundred downed trees, that hikers should not attempt to follow them (regardless of how much you may trust any particular app).
An informal use trail to Laws is much more direct, generally well maintained, and avoids the bushwhacking of the abandoned trails (some local Idyllwild hikers dubbed it the “King Trail” when I established the route in 2019). It leaves Willow Creek Trail exactly 1.0 mile from Saddle Junction, 0.46 mile from the Skunk Cabbage turning (trailhead at N 33.7796, W 116.6590). The route is marked with cairns (and subtle flagging to aid USFS work crews) and descends following former deer trails for 1.2 miles, meeting Willow Creek about 0.15 mile upstream from the site of the historic Laws Camp (the remains of which were destroyed by the 2013 Mountain Fire and subsequent flood and treefall damage). Blowdowns from this winter have already been removed by the Trail Report, and the huge pine tree that fell in late 2024 was kindly removed by Forest Service volunteers in May 2026.
East from Laws the old Caramba Trail is initially heavily obscured by blowdowns and thick regrowth, but the easternmost 1.5 miles closest to Caramba camp is often well marked with cairns placed by myself and others. Much of the old trail rock work is visible in places. The first mile east of Laws is currently marked largely along the former trail route with orange flagging (for use by USFS work crews), although it is not recommended to follow this in some areas as it goes directly through blowdowns and obstructive vegetation, not around them.
Work to rehabilitate the original Caramba Trail started in June this year – combining the Trail Report, other volunteers, and Forest Service employees – almost exactly 13 years after it burned in the Mountain Fire. Unsurprisingly it is proving to be a very slow process and it is possible that 2-3 years of work may be required to fully rehabilitate the old trail routes. Please do not remove, move, or (as described above) attempt to follow, flagging in this area which has been placed to guide USFS work crews.
The Trail Report “adopted” Seven Pines Trail as a priority for maintenance work due to a disproportionate number of lost hiker rescues (with the agencies evidently no longer maintaining the route). In the past seven years we have removed 101 downed trees and the trail is largely trimmed and cleared annually. Thankfully only two large blowdowns affected the trail this past winter, and both now have very easy workarounds. Although our work has restored this delightful trail to its best condition in decades, Seven Pines remains a genuine wilderness trail very unlike the wider, bare, obvious routes of, for example, Devil’s Slide or Marion Mountain trails. Cautious navigation remains invaluable for those without extensive experience of hiking this trail.
Spitler Peak Trail is functionally clear of treefall hazards, despite having been decimated by about 65 new blowdowns in February storms. By March the Trail Report had cut almost all of these, bringing to 235 the number of trees we have removed from this trail in the past seven years. The remaining four large cedars were removed by Forest Service at the end of March.
The San Jacinto Trail Report celebrates ten years of operation in 2026. The Report has helped tens of thousands of hikers, and saved multiple lives, both directly and indirectly. Since the Report became established online, snow/ice rescues in the San Jacinto Mountains have dropped 82%, with an additional benefit of saving Riverside County hundreds of thousands of dollars. While all time is volunteered, the Report uses small private donations to help cover operating costs. Donations keep the Report available to all, free from advertising or paywalls, and independent from agencies. If you have found this Report useful, please consider using this link to the Donate page. Thank you very much for your support.
