Overview
The South Fork Trail to San Gorgonio Mountain is the longer, gentler alternative to the Vivian Creek route for those wanting to stand on the highest point in Southern California. At 19.1 miles round trip with 4,708 feet of gain, it's still a demanding undertaking, but the approach through South Fork Meadows, past Dollar Lake, and up to Dollar Lake Saddle breaks the climb into more digestible segments. For backpackers, this is the preferred route: there are designated campsites at South Fork Meadows and near Dollar Lake, allowing you to divide the summit bid across two comfortable days rather than one brutally long one. The summit view is the same from either route: on a clear day, the Pacific Ocean to the southwest, the Mojave extending north, and the full Los Angeles basin spread below.
The South Fork Trailhead sits at roughly 6,800 feet on Highway 38, and the summit of San Gorgonio is at 11,503 feet, a net gain of about 4,700 feet. The route passes through four distinct zones: lower pine forest, South Fork Meadows, the sub-alpine zone around Dollar Lake at 9,300 feet, and the exposed summit ridge above 10,500 feet. The grade is more distributed than Vivian Creek, which concentrates its gain in steep sustained switchbacks. As a day hike, most experienced hikers take 10 to 12 hours round trip. The two-day backpacking approach is far more enjoyable and allows time to appreciate the meadows and alpine lake rather than moving through them as fast checkpoints.
The Route
Miles 0 to 2.5: Lower South Fork. The trail climbs through Jeffrey pine and white fir on a moderate and consistent grade. The forest provides good shade on the lower section. You cross into the San Gorgonio Wilderness at approximately mile 2.5.
Miles 2.5 to 4: South Fork Meadows. The meadow appears around mile 4 at 8,200 feet. Designated campsites are nearby. The meadow is lush through summer with a seasonal creek, and wildflowers peak in late July. This is a natural stopping point for the first night on a backpacking trip.
Miles 4 to 5.7: Dollar Lake. From the meadow, the trail continues southwest and climbs to Dollar Lake at 9,300 feet. Dollar Lake is small and scenic, a good rest point and overnight option for backpackers. The terrain above the meadow becomes more open, with views beginning to open up to the higher country above.
Miles 5.7 to 8: Dollar Lake Saddle. Above Dollar Lake, the trail climbs steeply to Dollar Lake Saddle at approximately 10,500 feet. This is one of the harder sections of the route. The saddle connects to the San Bernardino Peak Trail and the San Gorgonio Mountain Trail.
Miles 8 to 9.55: Summit Ridge and Top. From the saddle, follow the San Gorgonio Mountain Trail east along the exposed summit ridge to the top at 11,503 feet. The final 1.5 miles are rocky and open, with increasing wind. The summit is broad and flat, marked with a benchmark. Views extend in every direction on clear days.
When to Visit
Late June through July: The prime early-season window once snow clears from the upper route. Snow can persist above Dollar Lake Saddle (10,500 feet) into June in heavy snow years; check current conditions with the San Gorgonio Wilderness Association before visiting. South Fork Meadows wildflowers peak in late July, with paintbrush, shooting stars, and lupine blooming through the meadow. Water flows reliably at the meadow creek and around Dollar Lake.
August: Full summer season. The trail is dry and open throughout. Afternoon thunderstorms are a consistent and serious hazard on the exposed saddle and summit ridge; plan to summit and return to below timberline before noon. Weekend permits fill quickly; this trailhead sees significant backpacking traffic in August.
September and October: The best months for backpacking. Permit competition drops after Labor Day, afternoon storms become less frequent, and the high meadows take on autumn colors. Temperatures at Dollar Lake Saddle are noticeably cooler; bring an insulating layer for camp. Snow can arrive at summit elevations by late October, so check conditions for any post-September attempt.
Winter and spring: The route above the wilderness boundary becomes a winter mountaineering objective. Snow covers the upper trail from November through May in most years. Day hikers should wait until late June for a safe ascent.
What to Bring
- Water: Many hikers carry 3 or more liters and plan to filter refills along the route. The creek at South Fork Meadows and streams near Dollar Lake are generally running through summer. Above Dollar Lake, carry enough to reach the summit and return. Individual hydration needs vary based on body weight, pace, and temperature.
- Bear canister: Required for overnight trips in the San Gorgonio Wilderness. Bears are active throughout the wilderness, particularly near established campsites.
- Layers for the summit: The temperature difference between the 6,800-foot trailhead and the 11,503-foot summit is often 20 to 30 degrees. A base layer, insulating mid layer, and wind or rain shell are essential.
- Microspikes: Useful for any visit before late June; the upper route above Dollar Lake Saddle retains ice on north-facing sections into early summer.
- Trekking poles: Helpful on the long descent, particularly the steep section from Dollar Lake Saddle back to the meadow.
- Early alarm: Day hikers need a 4 to 5 AM start to summit and return before afternoon storms.
Practical Details
Parking: The South Fork Trailhead has a large paved lot at 6,800 feet on Highway 38. An Adventure Pass or Interagency Annual Pass is required. The lot fills on summer weekends; arrive by 7 AM for a space. A vault toilet is at the trailhead. This lot is shared with the Dollar Lake Trail and other South Fork routes.
Permits: A free wilderness permit from the San Gorgonio Wilderness Association (sgwa.org) is required for all day hikes and overnight trips. Quotas apply. Reserve online up to 90 days in advance. Summer weekend slots fill weeks to months ahead.
Dogs: Not permitted in the San Gorgonio Wilderness. No exceptions.
Water: South Fork Meadows creek and Dollar Lake area streams are reliable through summer. Above Dollar Lake, no reliable water source exists before the summit. All backcountry water must be filtered or treated.
Fees: Adventure Pass or America the Beautiful Interagency Annual Pass for parking. See the America the Beautiful pass guide for veteran and senior pass information.
Cell service: None on the trail. Download maps offline before departing.
Fire restrictions: The wilderness frequently operates under fire restrictions from June through October. Check current rules at the Barton Flats Visitor Center or the San Bernardino NF website before your trip.
Getting There
From Redlands, take Highway 38 east approximately 31 miles into the San Bernardino Mountains. The South Fork Trailhead is on the south side of Highway 38, about 6 miles west of the Jenks Lake Road junction near Angelus Oaks. Look for the large paved parking lot and the trailhead sign. The drive from San Bernardino takes about 50 minutes; from downtown Los Angeles, allow 2 to 2.5 hours.
Beyond the South Fork
For those visiting San Bernardino National Forest, the South Fork route is the best option for backpackers doing their first San Gorgonio summit bid. The Vivian Creek Trail is shorter but more intense as a day hike for those who prefer that style. For a shorter introduction to the San Gorgonio Wilderness that reaches alpine terrain without committing to the summit, the Dollar Lake Trail follows this same trailhead and approach to Dollar Lake at 9,300 feet, an excellent overnight destination in its own right.