Ascent of Trinity Mountain on 2014-08-28

Climber: Edward Earl

Date:Thursday, August 28, 2014
Ascent Type:Successful Summit Attained
    Motorized Transport to Trailhead:Hi-Clearance Vehicle
Peak:Trinity Mountain
    Elevation:9451 ft / 2880 m

Ascent Trip Report

On US-20 at virtual mile 116.2, I turned NW on Anderson Ranch Dam Rd. The turnoff is ~20 miles from I-80 near Mountain Home or ~20 miles from the Camas-Elmore county line near Hill City. Signs at the turnoff indicate the Fall Creek Recreation Area. Note or zero your odometer at the turnoff. At 3.3 miles the pavement ends. The wide, smooth, well-graded gravel road then descends several hundred feet into a deep gorge with walls of lava. At 4.8 miles I turned L across the dam. Although it's wide enough to permit most vehicles to pass, it's still nominally 1 lane, so it's controlled by a traffic light that lets traffic through only 1 way at a time. At 5.1 miles I reached the other end of the dam and turned R on Fall Creek Rd. For several miles the road winds its way along the shoreline until mile 13.5, where I reached the Fall Creek Resort and boat launch. At mile 13.7 I made a shallow L turn at an RV campground to remain on Fall Creek Rd. At mile 18.2 I made a shallow L turn onto Meadow Creek Rd. Ice Springs CG is immediately thereafter on the L. At mile 19.9 the road is briefly paved over a bridge. Immediately after that I turned R on Trinity Ridge Rd, also signed as FR 129. A sign says the road is not suitable for passenger cars, but that doesn't apply for the first several miles. At mile 20.7 the road is temporarily paved over a bridge. At mile 22.4 on the R is a horse loading dock and some corrals. At mile 23.4 the road is briefly paved over a bridge. At mile 26.2 I passed the Bear Hole TH. At mile 26.7 the road becomes a little rockier but it is still OK for any street legal vehicle. A side road branches L at this point. At mile 27.8 is a R turn, the road begins climbing, and for the first time high clearance is advised. A low clearance vehicle will likely have trouble in many places after this point. At mile 28.5 is a campsite on the R, just after which I passed through an open gate. At mile 29.6 Is a sharp R switchback followed by a steep climb. A couple hundred yards up this hill are some large rock slabs which I deemed too risky to try to drive over. I backed down the hill back to the switchback and parked, using the very ample width.

From this point it is a straightforward 4 mile, 1500 foot gain hike to the summit lookout.
Summary Total Data
    Total Elevation Gain:1571 ft / 478 m
    Extra Gain:50 ft / 15 m
    Round-Trip Distance:8 mi / 12.9 km
    Route:FR 129
    Trailhead:FR 129  7980 ft / 2432 m
    Route Conditions:
Road Hike
Ascent Statistics
    Time:1 Hours 20 Minutes
Descent Statistics
    Time:1 Hours 10 Minutes

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