Big Lake changes vehicles, not habits. Summer lines the north launch with jet skis. More than three hundred marina slips feed boats into water that also takes floatplanes. After twelve inches of ice, measured with chainsaws marked by the inch, volunteers plow a road. Concrete trucks and fuel trucks cross it alongside snowmachines, people launching rockets, and ultralight pilots. In February 2026, Iron Dog teams left South Big Lake two minutes apart. The lake becomes pavement without ceasing to be water. The traffic leaves part of itself behind. In the East Basin, the upper five meters are seasonally impaired by petroleum hydrocarbons from motorized watercraft. Older two-stroke engines were thirteen percent of those surveyed but contributed about half the hydrocarbons. At the North Shore swimming and launch bay, one reading reached 75.7 micrograms per liter against a ceiling of ten. Listed since 2006, Big Lake still appeared impaired in Alaska's draft 2026 report. In 2004, the two basins averaged 6.4 meters of clarity. The hydrocarbon problem sits shallower.
curator · lake-level · as of Sep 3, 2026
The facts
- Surface area 12.4 km² usgs-3dhp · lake-level · as of Jun 2, 2026
- Nearest town Big Lake · 0.9 km osm-overpass · lake-level · as of Jun 2, 2026
- Bird species (within 25 mi) 141 ebird-api-v2 · lake-level · as of Jun 2, 2026
- Bird diversity index 0.94 ebird-api-v2 · lake-level · as of Jun 2, 2026
- Median home value $304,300 census-acs-2024-b25077 · block-group-level · as of Jun 2, 2026
- Water clarity Clear curator · lake-level · as of Sep 3, 2026
- Night sky Dark skies viirs-black-marble-vnp46a4 · lake-level · as of Sep 3, 2026
- Surroundings Resort — a shoreline built for visitors curator · lake-level · as of Sep 3, 2026
- Water origin Natural lake with a regulated outlet curator · lake-level · as of Sep 3, 2026
In more detail
- Climate
- strongly four-season; frigid winters (~12°F mean), cool summers (~57°F); ~18 in precip/yr curator · lake-level · as of Sep 3, 2026
- Public access
- Big Lake has well-developed, multi-agency public access. Alaska State Parks operates two recreation sites on the lake, Big Lake North and Big Lake South, each with a boat launch, campsites, picnic areas, and swimming. The Matanuska-Susitna Borough separately operates its own public Big Lake Boat Launch and day-use parking lot. Access is paid (daily parking / launch fees or borough parking passes) but genuinely public. Fees/permits: Daily parking fee at both Alaska State Parks recreation sites (exact rate on the Alaska State Parks fee schedule, not itemized on the unit pages). Mat-Su Borough Big Lake Boat Launch: $20 single-day or $125 annual parking pass.. Sources: dnr.alaska.gov (fetched 2026-07-12); newsrelease.adfg.alaska.gov (fetched 2026-07-12); matsu.gov (fetched 2026-07-12). curated-web-harvest · lake-level · as of Jul 12, 2026
- Dogs and pets
- high — 8 dog parks within 25 mi (OSM); state rule: In developed facilities of Alaska state parks and recreation sites, dogs must be on a leash no longer than nine feet and under control by a person at all times. In backcountry areas dogs may be off-leash if kept within voice command. A person permitted to occupy a public-use cabin may have their dog off-leash within 300 feet of that cabin if it remains under control. (11 AAC 12.130 (Pets), as summarized on the Alaska State Parks FAQ page, fetched 2026-07-12); No Big Lake-specific pet/dog rules (off-leash beach, dog park, pet ban) were found on the Big Lake North SRS, Big Lake South SRS, or Mat-Su Borough Big Lake pages; the general Alaska State Parks developed-facility leash rule (9-ft leash, under control) applies at both DNR recreation sites. One targeted search for lake-specific pet/leash info returned no lake-specific results. curated-web-harvest · lake-level · as of Jul 12, 2026
- Property tax
- 1.06% ACS effective-rate proxy (2024 ACS 5-year; Matanuska-Susitna Borough anchor: $3,685 median real-estate taxes paid ÷ $346,600 median owner-occupied home value; Alaska proxy 1.11%, -0.04 percentage points). census-acs-2024-property-tax · county-level · as of Dec 31, 2024
Where it’s heading
Rising hand-rated for v0.1 · lake-level · as of Sep 3, 2026
Rising, documented on population and permanence rather than price: the Mat-Su Borough is "the fastest-growing large area of the state" and grew the most of any area in 2024–2025 (+1,696; Alaska DOLWD 2026, search-extraction), averaging 3.4%/yr over 25 years (borough, 2016); Big Lake CDP 2,635 → 3,350 → 3,833 (2000–2020 censuses); the 2009 comprehensive plan documents weekenders becoming year-round residents and modest cabins becoming costly second homes; the borough bought the Big Lake Lions Recreation Center in 2025. Hedge: listing prices are mixed/flat 2025→2026 (aggregators, contradictory) — the trajectory is people, not price.