From Interstate 15, take Lytle Creek Rd (Sierra Av.) about 6.4 miles to Middle Fork Rd. After passing a few houses this road becomes "2N58" which more or less follows the middle fork of Lytle creek. 2N58 will take you 3 miles for a very rough rocky ride directly to the Middle Fork Trailhead where you will find ample room for parking.
Middle Fork Trail gets it's name by virtue of the fact it parallels the middle fork of Lytle creek most of the way to Ice House Saddle. This trail is popular with the Boy Scouts and other happy campers because it sees far less traffic than the Ice House Canyon Trail and has at least 3 good camp sites along the way. This route is generally not taken by people who are headed for Cucamonga Peak because it's a little more mileage and a greater elavation gain to the summit. But if you're looking for an alternative to the busyness of Ice House, this is the trail for you.
For winter travel, crampons may be needed on a few dicey spots. Unless you plan to repel to one of several water falls along the creek, no technical equipment is needed.
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