Assertion: wilderness's mile | /r/HasProperty | 510 km
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Source sentences:
text: The maximum east–west distance in the Upper Peninsula is about 320 miles (510 km), and the maximum north–south distance is about 125 miles (201 km).
text: This is a very popular area for hiking, with 323 miles (520 km) of hiking trails and 11 campgrounds (ranging from very rugged to suitable for recreational vehicles).