What's on in Isle Royale National Park, United States through the year

Busy — Winter / Christmas break in United States, school holidays in 2 of the markets that fill it

Nothing new starts in January.

Still on: Winter closure (1 Nov – 15 Apr)

Quiet — one of its worst months for weather

Nothing new starts in February.

Still on: Winter closure (1 Nov – 15 Apr)

Busy — Spring break in United States

Nothing new starts in March.

Still on: Winter closure (1 Nov – 15 Apr)

Shoulder season — an ordinary month

• Opening

  Island season opens

  16 Apr – 31 OctTrail seasonBook early

  The park is open 16 April to 31 October and shut the rest of the year, so the whole trip has to fit inside that. Ferries and seaplanes build to a full timetable by June; in April and October there may be one crossing a week. Source ↗

Still on: Winter closure (1 Nov – 15 Apr)

Shoulder season — an ordinary month

Nothing new starts in May.

Still on: Island season opens (16 Apr – 31 Oct)

Busy — Summer break in United States, school holidays in 2 of the markets that fill it

• Hazard

  Black fly and mosquito weeks

  1 Jun – 20 Jul · usuallyInsect season

  Six weeks when the black flies and mosquitoes on the interior trails are genuinely trip-ending without a head net, and the shelters with screens are the ones people fight over. It eases off through August. Source ↗

Still on: Island season opens (16 Apr – 31 Oct)

Peak crowds — travelers describe it as peak season, Peak backcountry season

• Season

  Peak backcountry season

  10 Jul – 25 AugSchool holidaysCrowdedBook early

  The least-visited national park in the lower 48 still fills its shelters in high summer, and campsites are first-come with no booking. Plan a night you can walk past if the one you wanted is taken.

Still on: Island season opens (16 Apr – 31 Oct), Black fly and mosquito weeks (1 Jun – 20 Jul (usually))

Peak crowds — Peak backcountry season, Summer break in United States

Nothing new starts in August.

Still on: Island season opens (16 Apr – 31 Oct), Peak backcountry season (10 Jul – 25 Aug)

Busy — Summer break in United States

• Nature

  Moose rut

  15 Sep – 20 Oct · usuallyRutting seasonRisk

  Bulls are loud, unpredictable and on the trails through late September and October, and the island has a famously dense moose population with nothing much hunting them. Give them the whole path.

Still on: Island season opens (16 Apr – 31 Oct)

Shoulder season — an ordinary month

Nothing new starts in October.

Still on: Island season opens (16 Apr – 31 Oct), Moose rut (15 Sep – 20 Oct (usually))

Busy — Thanksgiving break in United States

• Closure

  Winter closure

  1 Nov – 15 Apr

  The park closes completely for five and a half months, and the closure runs four and a half miles out into Lake Superior, so you cannot even anchor off it. There is no winter version of this trip. Source ↗

Busy — Winter / Christmas break in United States, school holidays in 2 of the markets that fill it

Nothing new starts in December.

Still on: Winter closure (1 Nov – 15 Apr)