Page Type Page Type: Mountain/Rock
Location Lat/Lon: 41.14921°N / 120.12674°W
Additional Information County: Lassen
Activities Activities: Hiking
Seasons Season: Spring, Summer
Additional Information Elevation: 8737 ft / 2663 m
Sign the Climber's Log


Hat Mountain
The triangular shaped Hat Mountain is located at the southern end of the Warner Mountains in the Modoc National Forest in far northeastern California. It lies 10.04 air miles SSE from Eagle Peak, the highest point in the Warner Mountains and high point of Modoc County. Hat Mountain is the high point of Lassen County. There is a rock outcrop near the south end of the relatively flat summit area that is probably the actual high point although there is also a register at the north end overlook whose elevation seems close. Hat Mountain receives few visitors as evidenced by the fact that the north register was placed by Gary Suttle in 1991 and still has room for more log ins.

Hat Mountain is a classic fault block peak with a steep eastern face and a gentle slope to the west. It has a surface of volcanic rock overlaying older sedimentary beds. Sage brush is the dominate plant life on the summit plateau with stands of aspen while the lower slopes are covered with Jeffrey pine and white fir.

The views from Hat Mountain are expansive. To the west is the Modoc Plateau and the sentinel of Northern California, Mount Shasta. Lassen Peak can be seen to the southwest while Eagle Peak and the rest of the Warner Mountains lie to the north. To the east is the Surprise Valley and the range and basins of the Great Basin. To the south, the tablelands of Hat Mountain merge with Red Rock Mountains

Getting There

Hat Mountain
Probably the most common place to head for Hat Mountain is from the Camp One Spring area. From US 395 in Likely, CA (approximately 20 miles south of Alturas and 85 miles north of Susanville) head east on Jess Valley Road (Forest Road 64) 9 miles to a T junction. Turn right (still FR 64) and travel approximately 17.6 miles (the road becomes gravel at about 6.5 miles) and look for a sign that says “Camp One 2 Miles”. Turn right (south), at 1.2 miles down this rough road, Keep left and follow the ever roughening road for about another 0.6 miles. Here you will find a primitive camp area at the edge of the forest and a large sage brush covered flat. You will be able to see Hat Mountain from here.

To get to the peak you can set off cross country through the sage (as I did) or follow the worsening road you were on until it comes to a ravine and follow the faint trail along a very small stream to the north shore of Lost Lake. From the south side of Lost Lake head off south, cross country (there are no trails to the summit) through the forest until you come out to the open plateau, turn east and hop rocks and wade through sage to your destination. Another option from Lost Lake is to move to you left through the forest to find a large boulder slope and rock hop your way to the summit.

There is a rough 4WD jeep road to Lost Lake from the east, but not having traveled it will not attempt to give mileage or directions.
Boulder Route

Red Tape

No permits are required except for a fire permit (obtainable for free from any Forest Service or BLM office) if camping at any of the primitive campsites.

When to Climb

June or when the roads open through late October or when the snow flies, which ever comes first. It gets hot in this area in the summer time and on occasion fire closures can stop you from entering the area. It would be wise to check with the local ranger district prior to making the effort to get to this rather remote area.
Modoc Ranger Station: 530-299-3215


There is primitive camping (no water or toilet facilities) at either Camp One Spring or Lost Lake.

The closest developed camp ground is the Patterson Campground along FR 64 at Approximately 14.2 miles from the junction. It is a small 5 site campground (tents or RV's up to 20 feet in length) which has no fee. Due to the elevation (7200 ft.), this CG is rarely open before July Drinking water, picnic tables, fire grills and vault toilets are available.

Blue Lake campground is larger campground on a 160 acre lake. There are 48 Tent and RV sites with picnic tables and fire pits. There is water, vault toilets and even a boat ramp. Cost is $7 per night

There are other campgrounds in the area but these are the two closest

Climate and Weather Conditions

Summer temperatures in the Wilderness provide mild, warm days; cool nights; and light rainfall. Summer lightning storms can occur any time. Maximum high temperatures can be expected during August. The most consistent warm weather is in July and August. Severe snowstorms are likely after mid-September. Snow typically stays in the Wilderness until mid-July. Winter temperature are well below zero degrees Fahrenheit, with snow depths from 6 to 8 feet. Rain or snow can occur during any month of the year. Travelers should always be prepared for inclement weather.
Modoc Ranger Station: 530-299-3215 is the place to call for up to date information.



Children refers to the set of objects that logically fall under a given object. For example, the Aconcagua mountain page is a child of the 'Aconcagua Group' and the 'Seven Summits.' The Aconcagua mountain itself has many routes, photos, and trip reports as children.