State-specific addendum to PeakScout's Federal Land Liability framework. Covers water temperature modeling, wind/wave rapid change, USGS gauge lag, cold water immersion risk, marine weather scope, boat launch data limitations, PFD requirements under Montana law, and air quality advisory scope.
Montana's Boat Safety Act governs the operation of motorized and non-motorized vessels on state waterways. Key requirements include: mandatory personal flotation device (PFD/Type I–IV life jacket) availability for each person aboard, registration of motorized vessels, compliance with Montana Fish, Wildlife & Parks (MFWP) boating regulations, and prohibition on operating a vessel while under the influence of alcohol or drugs. Montana law may also require operator safety certification for vessels above certain horsepower thresholds for operators born after January 1, 1985. PeakScout does not track compliance with these requirements on behalf of users.
Montana's Recreation Responsibility Act places primary responsibility for safety on the recreationist. Individuals engaging in paddling, kayaking, canoeing, stand-up paddleboarding, and lake recreation assume the inherent risks of those activities. Landowners, land managers, and information providers (including PeakScout) are not liable for injuries arising from those inherent risks when they have not created an unreasonable risk of harm. This disclaimer is provided in accordance with MCA § 27-1-736. Nothing herein limits liability for gross negligence or willful or wanton misconduct. Consult a licensed Montana attorney with questions about your legal rights.
This disclaimer supplements — and does not replace — PeakScout's Federal Land Liability Disclaimer. Both apply when using PeakScout for Montana paddling or lake recreation planning.
PeakScout does not deploy water temperature sensors in Montana lakes or rivers. Temperature values are estimated using air temperature correlations, seasonal historical patterns, elevation, and inflow source models. These estimates can deviate significantly from actual conditions — particularly in spring when glacial melt, snowmelt inflow, or cold upwelling keeps surface water far colder than models predict.
Most Montana lakes and rivers are dangerously cold for paddling even in summer. Cold shock, swim failure, and hypothermia are the leading causes of paddling fatalities in the Northern Rockies. A capsize without proper gear in 50°F water can result in incapacitation within 3 minutes and death within 30–90 minutes without rescue. PeakScout data does not assess cold water immersion risk at specific launch sites.
| Water Temp | Cold Shock Phase | Swim Failure | Unconsciousness Risk |
|---|---|---|---|
| < 40°F (< 4°C) | Immediate gasp/hyperventilation | Under 3 minutes | Under 30 minutes |
| 40–50°F (4–10°C) | Severe cold shock | 3–10 minutes | 30–60 minutes |
| 50–60°F (10–16°C) | Significant cold shock | 10–30 minutes | 1–2 hours |
| 60–70°F (16–21°C) | Moderate cold shock | 30–60 minutes | 2–7 hours |
Drysuit or wetsuit appropriate to actual water temperature is required for safe paddling on Montana lakes and rivers during cold season. A life jacket alone does not prevent cold shock or swim failure. Most Glacier NP–adjacent lakes require drysuit consideration through late June. PeakScout does not assess your gear selection or cold water readiness.
Large mountain lakes (Flathead, Whitefish, Seeley, Holland, Georgetown, Swan, Glacier NP lakes) are highly susceptible to sudden squalls, afternoon wind events, and orographic storm development. Wave heights of 3–6 feet are possible on large lakes during wind events. PeakScout weather data is not real-time and does not provide sub-hourly wind or wave updates.
PeakScout displays USGS streamflow gauge data for Montana rivers. This data is subject to significant limitations that paddlers must understand before using it for trip planning or launch decisions.
The weather data displayed by PeakScout is sourced from general-purpose atmospheric models (Open-Meteo, NOAA point forecasts). These are not equivalent to NWS marine zone forecasts, lake-specific advisories, or small craft warnings. Before paddling any large or exposed Montana lake, consult the National Weather Service directly.
Boat launch locations, access information, and facility details displayed or referenced by PeakScout are compiled from publicly available sources including MFWP, USFS, BLM, NPS, and local county databases. This information is subject to limitations that users must understand before relying on it for trip planning.
Montana law (MCA 23-2-527) requires one USCG-approved PFD Type I–IV for each person aboard any vessel. Children under 12 must wear a PFD at all times when underway on motorized vessels. For kayaking and paddling, wearing a PFD (not merely having one aboard) is the only effective protection. PeakScout cannot verify your compliance with PFD laws.
Vessels on waters navigable under federal jurisdiction may be required to carry Coast Guard–approved visual distress signals (flares, flags, or lights). On remote Montana lakes with no cell coverage, a PLB (Personal Locator Beacon) or satellite communicator is strongly recommended regardless of legal requirements.
Montana and USCG regulations require a sound producing device (whistle, horn) on all vessels. In low-visibility conditions on large lakes, this may be the only means of signaling distress to other watercraft. PeakScout does not assess your vessel's compliance with equipment requirements.
Most Glacier NP backcountry lakes, Bob Marshall Wilderness waterways, and remote reservoir shores have no cellular coverage. A 406 MHz PLB or satellite communicator (SPOT, Garmin inReach) registered with NOAA is the only reliable emergency contact option in many Montana paddling areas.
A life jacket alone does not prevent cold shock or swim failure. In water below 60°F — which describes most Montana lakes for most of the paddling season — a wetsuit or drysuit appropriate to water temperature is required to survive capsize long enough for self-rescue or external rescue. PeakScout does not assess your gear selection.
River paddling on Montana whitewater (Gallatin, Clark Fork, Lochsa downstream into MT, Flathead forks, Blackfoot) requires whitewater-specific PFDs, helmets on Class III+, and throw bags in a paddle party. Scouting technical rapids in high spring runoff is mandatory — drops change character significantly between 5,000 CFS and 15,000 CFS. PeakScout's USGS gauge data is a starting point only.
When available, PeakScout displays air quality index (AQI) data sourced from the EPA AirNow network. This data is advisory in nature and subject to the following limitations.
TO THE MAXIMUM EXTENT PERMITTED BY MONTANA LAW, INCLUDING THE RECREATION RESPONSIBILITY ACT (MCA § 27-1-736) AND THE BOAT SAFETY ACT (MCA § 23-2-501 ET SEQ.), PEAKSCOUT SHALL NOT BE LIABLE FOR ANY INJURY, DEATH, PROPERTY DAMAGE, OR LOSS ARISING FROM: (1) reliance on modeled water temperature estimates; (2) wind, wave, or weather data displayed by PeakScout; (3) USGS stream gauge data lag, inaccuracy, or absence; (4) cold water immersion incapacitation or hypothermia; (5) boat launch access information sourced from public databases; (6) failure to consult or comply with NWS marine advisories or Montana AIS inspection requirements; (7) air quality index data from AirNow; or (8) any other feature of PeakScout used in connection with Montana paddling or lake recreation planning or travel. THIS LIMITATION SUPPLEMENTS THE FEDERAL LAND LIABILITY DISCLAIMER — BOTH APPLY TO MONTANA PADDLING USE.
To confirm you have read and understood this disclaimer, type your full legal name below as your digital signature. This constitutes a legally binding acknowledgment under Montana and federal law.