News

For only the fourth time in recorded history, Eaton Canyon has picked up over 42” of rain in a single winter season. After years of crushing drought and heat, water is once again prevalent in the canyon. Through May 11th, here are the season’s rain totals throughout the canyon:

• Eaton Dam: 42.72”
• Stonehill Neighborhood: 41.44″
• Henninger Helipad: 42.15″
• Inspiration Point: 45.04″
• Camp Hi-Hill: 60.24”

All of this water has helped the canyon turn lush and green for the summer season. Eaton Canyon is technically classified as having a Mediterranean climate. However, much of the vegetation here is more representative of a semi-arid desert thanks to the infrequently but heavy nature of winter storms. Water is not a common occurrence in the park, and so the next few months will be a very unique ecological period for the canyon with water readily available in the creek.

Water in the wash is expected to stick around nearly all summer, and it may be until July before the first crossing even dries up. The waterfall will still have a decent amount of water in it come November, unlike recent years where it was reduced to a trickle. It has rained on 62 days since October 1, 2022, which is more rainy days than any year since 2011. Only 6 other years since 1908 saw more rainy days than 2023. None of the infamous years of 2005, 1980, 1969, 1943, and 1939, which all witnessed exceptional flooding within the park, are on that list. Rain totals over an entire winter are not what causes flooding in Eaton Canyon. Instead, it is short bursts of exceptionally high rainfall over a period of hours or days that has sent 10-foot high walls of water through the park in the past. The 2023 winter, while wet, lacked exceptional storms that would’ve caused major flooding within the park. The storms were well spaced out, moderate, and did not contain extreme rain rates. As a result, minimal damage to the park was done. You can read more on this winter’s impacts here.

All of this heavy precipitation inevitably will grow fuels of wildfires later this year. In shrub-like ecosystems like ours, it is actually years with heavy rains that can see the most extreme wildfires. The extreme wildfire years of 2017, 2018, and 2020 in Southern California were not exceptionally dry years.

Record-breaking snowpack in California has brought relief to local mountain creeks and streams, with Eaton Canyon experiencing a surge of water flow.

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On Monday, March 27th, clean-up crews set out to clear an abandoned homeless encampment located ~80 yards up the east trailhead of the Altadena Crest Trail in Eaton Canyon. The encampment belonged to a homeless person found dead of hypothermia in a ditch about 20 yards below the Pinecrest Gate a month prior. No personal items aside from an iPhone were found during the clean-up.

The trash found there included copious amounts of plastic, electronic waste, half-buried bedding, cans of butane, batteries, lighters, and broken bicycles. In all, twenty 50-gallon bags were filled totaling over 1,000 lbs. of municipal waste. Much of the small canyon that the encampment was located in experienced mud flows when heavy rains fell, and some trash may still be buried under the mud. Clean-up crews will return to the location periodically to check for any trash that resurfaces. To the park staff’s knowledge, this is the only encampment in the upper half of the wash. 

In October 1993 during a northerly Santa Ana wind event, a campfire started by a transient along the Mount Wilson Toll Road spread to nearby brush, setting it on fire. While fire officials were busy with several other fires burning throughout Southern California, the fire descended the San Gabriel Mountains and ultimately burned over 100 homes lining the canyon. Homelessness is a continuing issue within the canyon, with over a dozen abandoned encampments having been cleared so far this decade. The county is aware of three other encampments located near the Nature Center that are also abandoned. 

Before photograph by Mitch Marich, after photograph by Edgar McGregor 

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