First, you must understand this is not a traditional route. I know of no other person who has ascended Cucamonga Peak using this route. That having been said, you may get there by taking the Haven Ave exit north from Highway 60 or from I-10 or from the 210. That’s right! All three of these freeways have a Haven Ave exit North. While driving up Haven, you will be looking straight up Deer Canyon on Cucamonga Peaks south face. Take Haven north all the way to the end. Here you will see a sign “ No Access, Private Property” and so on. You may park here as long as you will be back before 5PM. That’s when your unattended car must be off the street. I would recommend parking on the power line service road instead. It’s up just a tiny bit farther. Find a place where your vehicle can be well off the gravel road to leave room for others to pass by.
From Haven, hike up the steep paved service road past the large water tank and approaching the second tank about ¼ mile farther. Stay to the left of the second tank and ascend to the left of the Deer Canyon debris basin. Keep following the service road (gated) past two more smaller tanks. You will be following the steep rocky service road, (presumably used by the Cucamonga Water District), all the way up to the Cucamonga Truck Road, which is also referred to as San Sevaine Road. Once you attain this dirt and rock road, hike due east for about ¼ mile. Here the road takes a sharp, left, nearly 180 degree turn as it passes over a ridge. THIS IS THE RIDGE YOU MUST TAKE TO THE SUMMIT. Stay on it! Before the “Grand Prix” fire, this route was not possible. The brush was impenetrable.
You will be fighting some nasty scree slopes here and there but the views are amazing. There is no trail here just a well defined ridge route. I repeat, follow this ridge line and it will take you to the top. This route has an elevation gain of about 6300 ft. if started from the power line service road. So if you’re into big, single day elevation gains, you’ll love this one.
This is a south side route in southern California so Ice and crampons will rarely be needed. But it is a ridge route so expect wind. That means wind-proof jacket, pants, gloves, hat.
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