If you've already worked your way through the Delaware day-hike checklist, this is the list for what comes next. We ranked the state's hardest trails using a composite of difficulty tag (hard or expert), distance, and elevation gain, drawing from the 843 mapped Delaware trails in our database. These ten routes are reserved for hikers with the gear, the navigation skills, and the honesty about their own limits to tackle them safely.
Delaware is the second-smallest state — flat, low-elevation, and dominated by coastal plain. Hiking here means refuge boardwalks, beach trails, and gentle hardwood loops. There is no traditional alpine "expert" terrain; the toughest options are long flat through-walks like the Junction & Breakwater Trail at full length. Ticks and chiggers are abundant in coastal scrub; deer ticks carry Lyme.
Our rankings here are data-driven — pulled from the 843 mapped entries OutsideAtlas tracks in Delaware — but the data has limits worth being honest about. A composite score weights expert and hard difficulty tags alongside total mileage and elevation gain. The result favors long, vertically aggressive routes with documented technical sections — there are surely tougher off-trail objectives in the state, but those are outside the scope of a trail directory.
The Ranking
Ranked from #1 to #9. Click through any entry for the full trail page — map, elevation profile, weather forecast, and direct OpenStreetMap source link.
#1. Long Trail
Long Trail sits near Rosenhayn in Salem County and is rated hard — our pick for the toughest trail on the list. Expect ground surface on a genuinely demanding grade. Local trail-association reports tend to agree this is one of the better-maintained options in the area, which matters more on a hike of this length than on a quick walk. The natural-surface tread can get slick after rain and muddy in spring — pick a dry weather window if you have the flexibility. Best attempted by hikers comfortable with long days, route-finding when the path gets faint, and weather that can turn fast. Not a casual outing. See full trail details, map, and current weather on OutsideAtlas for the most current information.
Open the Long Trail trail page →Map, elevation profile, current weather, and OSM source.#2. Long Trail
Long Trail sits near Rosenhayn in Salem County and is rated hard — the #2 entry in a roster of hikes you don't take lightly. Expect ground surface on a genuinely demanding grade. The route is well documented in OpenStreetMap, which is what put it on our radar — community-mapped routes tend to be the ones that get hiked enough to stay open. The natural-surface tread can get slick after rain and muddy in spring — pick a dry weather window if you have the flexibility. Best attempted by hikers comfortable with long days, route-finding when the path gets faint, and weather that can turn fast. Not a casual outing. See full trail details, map, and current weather on OutsideAtlas for the most current information.
Open the Long Trail trail page →Map, elevation profile, current weather, and OSM source.#3. Long Trail
Long Trail sits near Rosenhayn in Salem County and is rated hard — the #3 entry in a roster of hikes you don't take lightly. Tagged hard in OpenStreetMap. It earns its ranking on the data, but trail conditions can change quickly after storms or fire seasons, so verify before you commit a full day. Best attempted by hikers comfortable with long days, route-finding when the path gets faint, and weather that can turn fast. Not a casual outing. See full trail details, map, and current weather on OutsideAtlas for the most current information.
Open the Long Trail trail page →Map, elevation profile, current weather, and OSM source.#4. Long Trail
Long Trail sits near Rosenhayn in Salem County and is rated hard — the #4 entry in a roster of hikes you don't take lightly. Tagged hard in OpenStreetMap. Compared to similar trails in Delaware, this route trades difficulty for either solitude or scenery — sometimes both. Best attempted by hikers comfortable with long days, route-finding when the path gets faint, and weather that can turn fast. Not a casual outing. See full trail details, map, and current weather on OutsideAtlas for the most current information.
Open the Long Trail trail page →Map, elevation profile, current weather, and OSM source.#5. Long Trail
Long Trail sits near Rosenhayn in Salem County and is rated hard — the #5 entry in a roster of hikes you don't take lightly. Tagged hard in OpenStreetMap. What makes this one earn its spot on the list is the combination of mapped detail and the kind of through-and-through experience that justifies a longer drive. Best attempted by hikers comfortable with long days, route-finding when the path gets faint, and weather that can turn fast. Not a casual outing. See full trail details, map, and current weather on OutsideAtlas for the most current information.
Open the Long Trail trail page →Map, elevation profile, current weather, and OSM source.#6. Long Trail
Long Trail sits near Rosenhayn in Salem County and is rated hard — the #6 entry in a roster of hikes you don't take lightly. Tagged hard in OpenStreetMap. Local trail-association reports tend to agree this is one of the better-maintained options in the area, which matters more on a hike of this length than on a quick walk. Best attempted by hikers comfortable with long days, route-finding when the path gets faint, and weather that can turn fast. Not a casual outing. See full trail details, map, and current weather on OutsideAtlas for the most current information.
Open the Long Trail trail page →Map, elevation profile, current weather, and OSM source.#7. Long Trail
Long Trail sits near Rosenhayn in Salem County and is rated hard — the #7 entry in a roster of hikes you don't take lightly. Tagged hard in OpenStreetMap. The route is well documented in OpenStreetMap, which is what put it on our radar — community-mapped routes tend to be the ones that get hiked enough to stay open. Best attempted by hikers comfortable with long days, route-finding when the path gets faint, and weather that can turn fast. Not a casual outing. See full trail details, map, and current weather on OutsideAtlas for the most current information.
Open the Long Trail trail page →Map, elevation profile, current weather, and OSM source.#8. Long Trail
Long Trail sits near Rosenhayn in Salem County and is rated hard — the #8 entry in a roster of hikes you don't take lightly. Tagged hard in OpenStreetMap. It earns its ranking on the data, but trail conditions can change quickly after storms or fire seasons, so verify before you commit a full day. Best attempted by hikers comfortable with long days, route-finding when the path gets faint, and weather that can turn fast. Not a casual outing. See full trail details, map, and current weather on OutsideAtlas for the most current information.
Open the Long Trail trail page →Map, elevation profile, current weather, and OSM source.#9. Lost Trail / Long Trail
Lost Trail / Long Trail sits near Rosenhayn in Salem County and is rated hard — the #9 entry in a roster of hikes you don't take lightly. Expect ground surface on a genuinely demanding grade. Compared to similar trails in Delaware, this route trades difficulty for either solitude or scenery — sometimes both. The natural-surface tread can get slick after rain and muddy in spring — pick a dry weather window if you have the flexibility. Best attempted by hikers comfortable with long days, route-finding when the path gets faint, and weather that can turn fast. Not a casual outing. See full trail details, map, and current weather on OutsideAtlas for the most current information.
Open the Lost Trail / Long Trail trail page →Map, elevation profile, current weather, and OSM source.Planning your Delaware trip
A few pieces of context are worth keeping in mind specifically for Delaware. Spring and fall are ideal; summer brings humidity and biting flies in the marshes; winter is mild but bare. Ticks and chiggers are abundant in coastal scrub; deer ticks carry Lyme.
Always cross-reference the official land-manager page before driving out — closures, fire restrictions, and seasonal road access can change quickly. Our trail pages link directly back to the OpenStreetMap source so you can see the tags we're working from.
If you're new to hiking generally, our beginner's guide covers footwear, layering, and the day-pack basics. For safety planning on bigger objectives, the ten essentials guide is worth twenty minutes of reading.
More Delaware hiking guides
If you found this useful, the rest of our Delaware coverage continues below.
- Top 10 longest trails in Delaware — Multi-day routes and through-hikes ranked by distance.
- Steepest trails in Delaware — Hikes with the most elevation gain in the state.
- Best beginner hikes in Delaware — Easy, well-marked trails for first-time hikers.
- Best national parks in Delaware — Federal parks and recreation areas ranked.
- Best waterfall hikes in Delaware — Trails leading to named falls, ranked by accessibility.
- Best dog-friendly hikes in Delaware — Where leashed dogs are explicitly welcome.
- Best family hikes in Delaware — Short, easy trails sized for kids and grandparents.
Rankings like this are starting points, not verdicts. Trail conditions change, new routes get tagged, and what was the toughest trail in Delaware last year might not be next year. We refresh these articles when the underlying data shifts meaningfully.
Got a correction, a route we missed, or a question? Drop us a note via the contact page. We read every email and we'd rather hear it from you than miss it.
