Campsites at South Lake Desor Campground (2026 Guide)

Introduction

Backcountry camping on Isle Royale requires a permit, and South Lake Desor Campground is one of the more remote options on the island. Located inland on the south side of Lake Desor off the Greenstone Ridge Trail, this campground has no canoe or kayak access. You walk in or you don't get there at all. For the 2026 season, the campground operates from April 16 through October 31, with the park closing entirely from November 1 through April 15. The 2-night stay limit applies from June 1 through Labor Day, which covers most of the prime hiking season. Before you plan a trip here, read the complete visitor guide for the full picture of what this campground offers and what it demands.

Most visitors to Isle Royale head for the Rock Harbor or Windigo areas. South Lake Desor is different. You will earn your stay here with miles of trail carrying everything you need. As of May 2026, there are two active NPS alerts that affect this campground and others on the east end of the island. A navigational buoy at Middle Islands Passage is off course, so boat traffic in that area requires extra caution. More relevant to campers here, new food storage guidelines are in effect after wolves accessed human food and garbage around Rock Harbor. You will need to follow stricter protocols for securing all food and scented items.

Getting to South Lake Desor Campground

The campground sits off the Greenstone Ridge Trail on the south side of Lake Desor. There is no vehicle access. There is no boat access. The 10 tent sites here are foot-access only, which means every ounce of gear you bring comes in on your back.

Trail access and routes

The Greenstone Ridge Trail runs the length of Isle Royale, roughly 40 miles from end to end. South Lake Desor Campground sits roughly midway along this route. Depending on where you start:

• From Rock Harbor to the east, expect 20-plus miles of rugged trail
• From Windigo to the west, the distance is similar
• The 7 tent-only sites fill on a first-come, first-served basis

No reservations are accepted for individual sites. You arrive, you find an open site, you claim it. In peak July and August, that can mean arriving early in the afternoon to secure a spot. Rangers will tell you that the common mistake is underestimating how long the trail takes. Isle Royale trails are not graded like mainland park trails. Expect rocky sections, exposed roots, and mud even in dry weather.

Ferry logistics

You reach Isle Royale by ferry from Houghton, Michigan (where the park headquarters is located at 800 E. Lakeshore Drive). The ride takes several hours. Factor that into your timeline. You cannot simply drive up and hike in the same afternoon. Most visitors spend the night before or after in Houghton.

What to expect at the campground

This is not a campground with amenities. You will not find potable water, flush toilets, or picnic tables. What you find is a designated camping area with tent pads and a vault toilet. The rest of the experience is up to you.

Site layout and terrain

South Lake Desor is inland, which means no lake views from your tent. The campground sits in a forested area on the south side of Lake Desor. The trail to the lake is a short walk from the sites. Water access requires carrying or treating.

The 10 sites include 7 tent-only pads. The remaining 3 are group tent sites available by advanced reservation only. Groups of 7 or more must submit permit requests through the park's online system. The fee for group sites is $25 per permit as of 2026. Small parties of 6 people or less pay no camping fee but must obtain a free overnight permit.

The food storage situation

The new food storage guidelines are not optional. After wolves learned to access human food near Rock Harbor, the park revised its requirements. You must store all food, trash, and scented items in an approved bear-resistant container or use the park-provided storage cables. Every camper at South Lake Desor needs to know these rules. Failure to follow them puts both you and the wildlife at risk.

Experienced visitors know that the food storage rules apply to everything with a scent. Toothpaste. Sunscreen. Deodorant. Chapstick. If it smells like anything other than the forest, it goes in the container.

Regulations and stay limits

Two-night limit

From June 1 through Labor Day, the maximum stay at South Lake Desor is 2 consecutive nights. This is strictly enforced. Outside that window, longer stays are permitted, but the window is short - the campground is only open from April 16 through October 31.

The 2-night limit serves two purposes. It keeps site turnover reasonable during peak season, and it prevents any single party from monopolizing a site. Given that this campground fills up, the limit works in everyone's favor.

Permits and fees

Small-party camping (6 people or fewer): $0. A free overnight permit is required.

Group tent sites: $25 per permit. Available by advanced reservation only.

Contact the park at 906-482-0984 or email isro_parkinfo@nps.gov for permit questions. The official website at nps.gov/isro/planyourvisit/camping.htm has the online request system for group permits.

What the official website doesn't emphasize enough

The park website covers the basics. Here is what experienced visitors wish they had known before their first trip to South Lake Desor.

Water is not guaranteed

There is a lake nearby, but you must treat all water. Giardia is present in Isle Royale waters. Boil, filter, or chemically treat every drop. The park website mentions this. It does not emphasize how much water you will actually need. Pack extra water for this stretch. The hike in is demanding, and arriving dehydrated because you skimped on carrying capacity is a preventable problem.

Weather changes fast

Isle Royale sits in Lake Superior. That means weather that shifts without warning. A clear morning can turn into cold rain by noon. Temperatures in May and October regularly drop below freezing at night. July and August highs typically run in the 60s and 70s, but rain gear belongs in your pack regardless of the forecast.

The Greenstone Ridge Trail is serious

The trail register is full of comments about how much harder the trail is than expected. This is not a groomed path. The rock can be slick when wet. The elevation changes may not be dramatic by mountain standards, but the cumulative effect over 20-plus miles with a full pack is significant. Most visitors underestimate how long the trail takes. Plan for 2 miles per hour as a realistic pace with gear.

Practical takeaways

1. Get your permit in advance. Small parties need the free permit. Groups of 7 or more need the online reservation and pay $25. Do this before you arrive.

1. Pack a bear-resistant canister or know how to use the storage cables. The new food storage guidelines are in effect. This is not optional.

1. Plan for the 2-night limit. From June 1 through Labor Day, you get two nights. That means arriving early enough on day one to set up, a full day for hiking or exploring, and packing out on day two.

1. Carry a water filter or treatment system. Lake water is available but requires treatment. Bring enough capacity to carry water for the hike in and out.

1. Check the buoy alert. If you are coming by boat, the Middle Islands Passage buoy is off course as of May 2026. Use caution in that area until the buoy is reset.

1. Visit the official website at nps.gov/isro/planyourvisit/camping.htm for current alerts, closure dates, and fee changes. Hours and rates can change between seasons.

1. Compare campgrounds by reading about all campgrounds on Isle Royale to decide which fits your trip plan.

Final thoughts

South Lake Desor Campground rewards the kind of hiker who values solitude over convenience. It is not the easiest campsite on Isle Royale. It is not the most scenic. What it offers is a genuine backcountry experience on one of the least-visited national parks in the lower 48. The 10 sites here see less traffic than the harbor-area campgrounds, and the hike in filters out the unprepared. If that sounds like your kind of trip, this campground belongs on your itinerary. If you prefer tent pads near a ranger station and reliable water spigots, look elsewhere. Both approaches are valid. Knowing the difference is what separates a trip you remember fondly from one you wish you had skipped.