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Boat launch

Marcus Island Boat Launch

Washington

About

Marcus Island Boat Launch is a boat launch in Lake Roosevelt National Recreation Area in northeastern Washington, managed by the National Park Service. It sits about 0.3 miles from the town of Marcus, making it an easy put-in for anyone already in town. Summer is the most comfortable time to launch. Typical averages from the nearby Colville weather station show July and August highs around 88 to 89°F, with fewer wet days than the rest of the year. Winters are cold, with January highs near 34°F and snow on about seven days that month. The closest neighbors are the North End Wall and Marcus climbing areas, both about 3.4 miles away. For time on foot, Sherman Creek Trail is about 7 miles off, and Trout Lake campground is about 8.5 miles away.

Launch Details

Managed by

National Park Service

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Location

Marcus Island Boat Launch

Washington

Data source: nps public poi

Facts about this place

When to go

Best time to go: Apr–Jun. The mildest months here, with typical highs of 62–78°F and lows of 35–49°F.

Typical monthly averages (not a forecast) from the Colville, WA weather station, 9 mi away. High / low in °F, and days with snow.

  1. Jan34° high23° low7 days with snow
  2. Feb42° high24° low4 days with snow
  3. Mar53° high29° low2 days with snow
  4. Apr62° high35° low
  5. May72° high43° low
  6. Jun78° high49° low
  7. Jul88° high53° low
  8. Aug89° high51° low
  9. Sep78° high44° low
  10. Oct61° high34° low
  11. Nov43° high29° low3 days with snow
  12. Dec34° high24° low7 days with snow

Source: NOAA NCEI U.S. Climate Normals 1991–2020

Where it is

Nearest town
Marcus, Washington · 0.3 mi

Source: NPS Land Resources boundaries; USGS GNIS populated places

Conditions

Active alerts for Lake Roosevelt National Recreation Area as of Oct 9, 2026:

Source: NPS Alerts API

Nearby

Source: Roamze catalog (indexable pages within 10 miles, PostGIS distance)