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Easy
Moderate
Hard
Any length
Under 3 mi
3–6 mi
6–10 mi
10+ mi
Any climb
Under 500 ft
500–1,500 ft
1,500–3,000 ft
3,000+ ft
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Out & back
Point to point
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4+ stars
4.5+ stars
1 trail for “Northerly Island”
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OBT-1
Northerly Island, Illinois
Easy
Distance
9.9 mi
Elevation gain
↑ 75 ft
Estimated time
4 h
Route type
Out & back
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