What You'll Find at Barrett Lake

Barrett Lake sits at 9,200 feet in the Eastern Sierra, about 15 miles south of Mammoth Lakes in the Inyo National Forest. It's a small alpine lake—roughly 12 acres—that holds brook trout and some cutthroat trout in cold, clear water. The lake sits in a granite basin with sparse lodgepole pine and open meadow, so you get long views across the high country and afternoon wind that can make the surface choppy by mid-day.

The lake is accessible by car, which sets it apart from many high-altitude waters in this region. The road is rough and high-clearance is recommended, but you don't need a backpack to fish here. That combination—elevation, trout, and drivable access—makes it a solid option if you want alpine fishing without a multi-day trip.

Key Takeaways

  • Barrett Lake holds brook trout and cutthroat trout at 9,200 feet, and the water is cold enough to support them year-round in the high country.
  • You can reach the lake by vehicle on a rough forest road, though high-clearance is recommended and the road is often closed by snow from November through May.
  • Fishing is best in July and August when the lake is fully thawed and insects are active; early morning and late evening produce better than midday.
  • The lake has no developed facilities—no restrooms, no water, no shade structures—so bring everything you need for a full day.
  • A California fishing license is required, and the lake is open to general trout season, which typically runs from late April through mid-November.

How to Reach Barrett Lake from Mammoth Lakes

From Mammoth Lakes, head south on Highway 395 for about 10 miles, then turn west on State Route 203 toward Minaret Summit. Continue past the Mammoth Mountain Ski Area entrance. The road to Barrett Lake branches off as a rough forest service road—ask at the Mammoth Ranger Station or check current conditions before you go, because the exact turnoff and road conditions change seasonally.

The final stretch is steep, rocky, and narrow. A standard sedan can make it in dry conditions, but high-clearance vehicles handle it much better. In wet weather or after rain, the road becomes slick and rutted. Snow typically closes the road from November through May, and early summer snowmelt can make it impassable even in June. Call the Inyo National Forest Mammoth Ranger Station at 760-924-5500 to confirm the road is open before you drive out.

Once you reach the lake, parking is informal—a small pullout near the shore. There are no services: no restrooms, no water, no picnic tables. Bring a cooler, snacks, and water for the day. Cell service is spotty or absent.

What Fish Live Here and How to Fish for Them

Brook trout are the primary species. They're aggressive and willing to take small spinners, flies, and even worms. They don't grow large—most run 8 to 12 inches—but they're plentiful and eager. Cutthroat trout are also present but less common; they're more selective and respond better to flies than to hardware.

The lake is shallow and clear, so fish are spooky in bright light. Early morning—first light through mid-morning—is your best window. Late evening, from about two hours before sunset onward, is your second-best bet. Midday fishing is slow, especially on calm, sunny days. The afternoon wind can actually help by breaking up the surface and making fish less wary.

From shore, work the drop-offs along the north and east sides where the bottom slopes away. Small spinners in silver or gold work well. If you fly fish, bring small nymphs (size 14 to 18) and dry flies (size 16 to 20). Terrestrials like ants and grasshoppers can be effective in late summer. The lake is small enough that you can cover most of it from shore in a few hours.

When to Fish Barrett Lake

The lake is typically open to fishing from late April through mid-November, following California's general trout season. However, snow and ice make it inaccessible most of that time. The practical fishing window is July through September, when the road is reliably open and the lake is fully thawed.

July and August are peak months. The water is warmest (still cold—probably in the 50s), insects are most active, and the weather is most stable. September can be excellent too, with fewer people and continued good fishing, though afternoon thunderstorms become more common and temperatures drop. By October, snow can return to the high country, and the road may close.

Avoid midday heat. Fish are most active in the first two hours after sunrise and the last two hours before sunset. On a typical summer day, you might fish hard from 6 a.m. to 9 a.m., take a break during the hot afternoon, and fish again from 6 p.m. to dark.

What to Bring and How to Prepare

This is a high-altitude, no-services lake. Bring more water than you think you'll need—at least two liters per person. The sun is intense at 9,200 feet, and dehydration sneaks up fast. Bring sunscreen, a hat, and sunglasses. Layers are essential; mornings are cold, afternoons can be warm, and weather can change quickly.

Pack your own lunch and snacks. There's no shade structure, so consider a small umbrella or pop-up tent for midday breaks. Bring a headlamp or flashlight if you plan to fish into dusk. A small backpack is easier than carrying loose gear, and it keeps your hands free for fishing.

For tackle, keep it simple: a small spinning rod with 4- to 6-pound line, a few spinners, and some basic flies if you fly fish. A net is helpful but not essential for small trout. Waders are optional—the shore is fishable without them, though wading lets you reach deeper water and different angles.

Regulations and Permits

You need a valid California fishing license. You can purchase a one-day license online at the California Department of Fish and Wildlife website or at sporting goods stores in Mammoth Lakes. The lake follows general trout season regulations: typically late April through mid-November, with a daily limit of five trout. Check the current regulations before you go, because limits and season dates can change year to year.

The lake is in Inyo National Forest, so you're on public land. No special permit is required beyond the fishing license. Camping is not allowed at the lake itself, but dispersed camping is available on forest land nearby—ask the ranger station for current options.

Frequently Asked Questions

Is the road to Barrett Lake passable in a regular car?

A standard sedan can make it in dry conditions, but high-clearance is safer and more comfortable. After rain or during snowmelt, the road becomes rough and slick. Call the Mammoth Ranger Station before you drive to confirm conditions.

Can I fish Barrett Lake in winter?

The road is typically closed by snow from November through May, making the lake inaccessible by vehicle. The lake itself may be partially frozen. Summer and early fall are the only practical seasons.

Do I need a boat or raft to fish here?

No. The lake is small enough that you can reach good fishing water from shore. Wading extends your range, but a boat is not necessary and not commonly used here.

What's the elevation gain if I hike from the parking area?

There's minimal elevation gain from the parking area to the shore—the road brings you to the lake. The challenge is the altitude itself (9,200 feet), not the hike. Take it easy your first hour to acclimate.

Are there other lakes near Barrett Lake?

Yes. The Mammoth Lakes Basin has dozens of alpine lakes within an hour's drive, many accessible by shorter hikes. The ranger station can point you toward options that match your fitness level and time available.