|Florence Lake (37.27671° N, 118.97660° W)|
From the Central Valley make your way towards Prather and continue east on Highway 168 towards Shaver Lake and then Huntington Lake, following the obvious road signs. At Huntington Lake, turn right onto well designated Kaiser Pass Road and follow it another 17 miles to an intersection where the road splits to Lake Edison. Instead of turning to Lake Edison, continue straight here for another 6 miles to Florence Lake.
|Hooper Creek Diversion Dam (37.30573° N, 118.95029° W)|
Due to the crossing of the Florence Lake outlet on this route, a high clearance vehicle is recommended for this trailhead, although in fall it may be possible to make it with a low clearance vehicle. A 4x4 is not necessary. The OHV road isn’t very long, and if needed walking the off pavement portion adds only a couple of miles at most. Follow the directions above to Florence Lake, but a quarter mile before reaching the lake turn left at the signed intersection towards Jackass Meadow and the Hooper Diversion OHV Road. In less than a mile the pavement ends as you turn left onto the OHV road. Follow the OHV road as it crosses the outlet of Florence Lake and bear right at an intersection 1.8 miles from the beginning of the OHV road. The road ends at the Hooper Diversion Dam about 2.2 miles from the start.
|Lake Edison (37.36735° N, 118.98340° W)|
Follow the directions mentioned above from Prather to Florence Lake, turning left at the intersection 17 miles after Huntington Lake towards Lake Edison. Follow the road another 6 miles to Lake Edison. Alternatively, the Bear Creek Diversion Dam trailhead can be used, turn right onto the OHV road 3 miles from the turnoff to Lake Edison and follow it 2 miles to the diversion dam (four wheel drive is necessary).
|Florence Lake||13.8 miles one-way||5800 feet|
+800 feet on return
|From the Florence Lake Trailhead wrap around the southwest side of Florence Lake and cross its inlet via a footbridge after 3.6 miles. After 8 miles pass the Muir Trail Ranch and soon turn left (north) at a junction towards Selden Pass and eventually onto the John Muir Trail. The trail begins a steep ascent before easing at Sallie Keyes Lakes. From the southern shore of the eastern lake, head directly up the easy class 2 southwest slope to the summit .|
|Florence Lake Ferry||10.1 miles one-way||5400 feet|
+400 feet on return
|If the timing works for your party it is possible to take the ferry across Florence Lake, saving the effort of walking around the southwestern shoreline. The ferry operates several times each day in season (generally early June to late September. For the most current information, check the Florence Lake Ferry Service website. From the east shore of Florence Lake, follow the remaining route description above.|
|Hooper Creek Diversion Dam||6.4 miles one-way||6300 feet|
+800 feet on return
|The statistics here include traveling via Mount Hooper on the approach and bypassing it on the return. This route is by far the quickest and easiest to the summit if you are familiar with cross-country travel, and even if you need to park a low clearance vehicle at the outlet of Florence Lake it adds only 1.9 miles each way and 300 feet gain total to your journey. It also has the bonus of including a visit to nearby Mount Hooper with minimal additional effort. From the diversion dam, head upslope on the right and simply traverse your way towards the outlet of Chamberlain Lake as shown on the route map. Except for a little brush in the beginning the travel is very easy and without bushwhacking. Once at Chamberlain Lake turn towards Mount Hooper to your left. Follow the steep, sandy class 2 slopes to the summit. From the summit walk down the sandy south slope of Mount Hooper, keeping right as needed to avoid cliffs on the southeast ridge (it is possible to cut over this onto the northeast slope as you descend. Follow the route over easy talus and slabs to Selden Pass and climb the class 2 northwest slope of Mount Senger. Note that if bypassing Mount Hooper, you can save 700 feet elevation gain by using breaks in the cliffs southeast of Chamberlain Lake and traversing the south slope of Mount Hooper.|
|Lake Edison||14.4 miles one-way||5900 feet|
+1100 feet on return
|Lake Edison is yet another option to reach Mount Senger. From the southwestern shore of the lake (near the dam) follow the trail up and over Bear Ridge, meeting the John Muir Trail after 5 miles. The John Muir Trail descends through the forest to reach Bear Creek 6.8 miles from the trailhead. Most of the route follows Bear Creek, but note the crossing of the Hilgard Branch (8.7 miles in) and especially Bear Creek (9.9 miles in) can sometimes be challenging during the peak runoff of heavy snow years. After the trail crosses Bear Creek it ascends to Marie Lake. From the southern shore of Marie Lake depart the trail and follow the class 2 northwest slope.|
|Southwest Slope – Class 2|
This is the easiest route on Mount Senger, though the northwest slope isn’t much more difficult. From the southern shores of Sallie Keyes Lakes just head cross-country over easy terrain up the slope to your east. You can see the summit area during most of the ascent. Walk over the summit plateau to the highpoint on the northern end.
|Northwest Slope – Class 2|
From either the southern shore of Marie Lake or Selden Pass (depending on your direction of approach) depart the John Muir Trail and head into the gully northwest of Mount Senger. Follow talus and slabs towards the saddle east of Mount Senger, with your exact route being dictated by residual snow conditions. From the saddle (and most of the route) the summit is visible and only a quick walkup remains.
|Northeast Ridge – Class 2-3|
From the Three Island Lake vicinity first gain the saddle immediately east of Mount Senger at 11,200 feet. The ridge itself has several cliffs and gendarmes, and the easiest path involves dropping a short distance to the small tarn on the southern side. Follow the path of least resistance well to the south side of the ridge. The route leans towards class 2 difficulty as you bear further south, and class 3 as you keep nearer the ridgeline.