If you’re looking for a “real Montana” lake day—clear mountain air, thick forest, cold-water swims, big-sky sunsets, and the kind of quiet you can actually hear—Tally Lake delivers. Tucked inside the Flathead National Forest west of Whitefish, this long, narrow lake feels wild and unspoiled, yet it’s easy to access for a weekend camping trip or a simple day-use escape. US Forest Service+1
What makes it truly stand out is its depth. Tally Lake is widely described as the deepest natural lake in Montana, and official bathymetry mapping puts its maximum depth at 495 feet.
Below is an extensive, search-friendly guide to Tally Lake—lake statistics, history, and the best things to do across every season.
Tally Lake Quick Facts and Statistics
Based on Montana Fish, Wildlife & Parks (FWP) mapping and waterbody data, here are the headline numbers for Tally Lake:
Surface Area: 1,211 acres
Elevation: 3,398 feet
Maximum Depth: 495 feet
Average Depth: 239 feet
Volume: 290,170 acre-feet
Location: Flathead County, Montana (FWP lists approx. 48.40176, -114.55508)
Why the depth matters: Deep lakes often fish differently than shallow lakes, warm up differently through the summer, and can be surprisingly “two-in-one”—warm near the surface on late-summer afternoons but cold and dark below.
Where Is Tally Lake?
Tally Lake sits in the Flathead Valley region of northwest Montana, on the Flathead National Forest, west of Whitefish.
Most visitors base out of:
Whitefish, MT (closest “full-service” town feel)
Kalispell, MT (more shopping, more lodging options)
The lake is accessed via forest roads, and the main developed recreation hub is Tally Lake Campground on the north end of the lake.
A Short History of the Tally Lake Area
Long before modern campgrounds and trailhead signs, the Flathead region has been home to Indigenous peoples for thousands of years, with deep cultural roots across western Montana. Today, the Confederated Salish and Kootenai Tribes (CSKT) represent the Bitterroot Salish, Upper Pend d’Oreille, and Kootenai, whose traditional territories covered broad areas of the region.
The logging era and “splash dam” history
Northwest Montana has a strong timber history, and parts of the Flathead National Forest landscape were shaped by early logging practices. Historical records for the Forest describe the use of splash dams—structures built to temporarily hold water and then release it to move logs downstream. Notably, the Flathead National Forest historical overview documents that a splash dam was built on Tally Lake for Stillwater log drives in the early 1900s era of timber transport.
Recreation growth on the Flathead National Forest
By the mid-20th century, recreation use on the Flathead National Forest grew rapidly, and historical documentation specifically calls out heavy use of destinations including the Tally Lake Campground during that boom period.
Best Things to Do at Tally Lake
1) Camp at Tally Lake Campground
If you want the classic experience—morning coffee in the pines, a mid-day swim, and a calm-water sunset—camping is the move.
What to know (official campground details):
Operated on the Flathead National Forest
Overnight fees: single sites listed at $22/night, group sites $150/night, plus extra vehicle fees
Reservations/fee details: commonly routed through Recreation.gov
Important rule: dogs are not allowed on the beach
Pro tip for Flathead Valley summers: Weekends can book quickly. If you can swing midweek, you’ll often get more quiet, more shoreline space, and easier boat ramp timing.
2) Swim and Beach Day (with mountain-lake vibes)
Tally Lake is a go-to summer swim spot for locals, especially because it feels remote and natural—no heavy development wrapping the shoreline.
A few practical notes:
Mountain-lake temperatures can be brisk early in the season.
Bring water shoes if you’re sensitive to rocky entry points.
Always keep an eye on wind and weather—mountain storms can roll in faster than expected.
3) Boating, kayaking, paddleboarding, and canoeing
Because Tally Lake is long and narrow, it’s great for paddlers looking for scenic mileage. Early mornings usually offer the calmest surface for kayaking and stand-up paddleboarding.
If you’re using a motorboat, remember you’re sharing space with swimmers and paddlers—slow down near shore, and be extra cautious around the day-use areas and beach zones.
4) Fishing Tally Lake
Tally Lake is a popular fishing destination in Montana’s Region 1, and FWP provides official lake mapping and lake data through FishMT. myfwp.mt.gov+1
Anglers commonly target cold-water species and perch, and you’ll want to check the current Montana fishing regulations before you go (seasons, limits, and any special rules can change year to year).
Best times to fish:
Spring/early summer: shoreline action can be strong as water temps climb
Late summer: early/late in the day often beats the midday heat
Fall: crisp mornings, fewer crowds, and great “Montana lake” atmosphere
5) Hike to a viewpoint: Tally Lake Overlook Trail #804
If you want a quick hike with a big payoff, the Tally Lake Overlook Trail (#804) is a local favorite. Official Flathead National Forest trail information lists Trail #804 at 2.0 miles.
Expect a short, punchy climb and a viewpoint that makes the lake’s long, fjord-like shape feel dramatic.
Trail tips:
Go early for cooler temps and calmer light for photos.
Pack bug spray in peak mosquito season.
Keep food secured and stay bear-aware (this is northwest Montana forest country).
6) Mountain biking and exploring forest roads
The Tally Lake area connects into a wider network of forest roads and trails on the Tally Lake Ranger District. Whether you’re biking, hiking, or taking a scenic drive, the surrounding forest gives you that “endless Montana” feeling—larch, fir, and big views when the canopy opens up.
7) Wildlife watching and photography
Wildlife is part of the deal around Tally Lake. You may spot:
Bald eagles or osprey over the water
Deer along the roads at dawn/dusk
Occasional bear or moose sign in quieter pockets
Bring binoculars, keep distance, and never feed wildlife.
Seasonal Guide: When to Visit Tally Lake
Summer (June–August)
Best for: swimming, paddleboarding, camping, beach days, family trips
Expect: the most people, the warmest surface water, the longest daylight
Fall (September–October)
Best for: hiking, photography, quieter camping, crisp mornings
Expect: fewer crowds and stunning color as larch and understory shift
Winter (November–March)
Best for: solitude, snowy forest scenery, and a true “Montana quiet” experience
Expect: limited services and changing road conditions—plan conservatively
Spring (April–May)
Best for: anglers, shoulder-season camping (when open), and waterfall/creek flow
Expect: muddy roads at times and variable weather
(For campground season specifics, always check the current status/alerts where you book or through the Forest Service listing.)
Know Before You Go: Helpful Rules and Good Etiquette
A few points that make everyone’s trip better:
Respect the beach dog restriction at the developed area.
Pack out trash (including fishing line).
Give paddlers and swimmers plenty of room if you’re boating.
Keep a clean camp—store food properly and don’t leave coolers out.
Why Tally Lake Belongs on Your Montana Bucket List
Tally Lake checks a rare box in the Flathead Valley: it feels remote and wild, but it’s still accessible enough to enjoy without an expedition-level plan. With official mapping showing 1,211 acres, a 3,398-foot elevation, and a striking 495-foot maximum depth, it’s also one of the most unique lakes to explore in Montana.
Whether your ideal day is paddling glassy water at sunrise, camping under tall timber, hiking up to the overlook for the “wow” photo, or simply getting away from town for a quiet swim—Tally Lake is one of the Flathead Valley’s best-kept (but not-too-secret) outdoor gems.
























