Permanent claim record · Sleeping Bear Dunes National Lakeshore

The full Dune Climb hike from parking area through the dunes to Lake Michigan and back is 3.5 miles taking 3-4 hours at grades near 45%; climbing the main dune takes 20-45 minutes of hard effort — running down takes about 5.

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{"tags":["dune-climb","sleeping-bear","hiking"],"text":"The full Dune Climb hike from parking area through the dunes to Lake Michigan and back is 3.5 miles taking 3-4 hours at grades near 45%; climbing the main dune takes 20-45 minutes of hard effort — running down takes about 5.","category":"numbers"}

Predicate	trivia.fact
Subject	Sleeping Bear Dunes National Lakeshore (venue)
As of
Status	Verified
Source	Michigan Famous Foods, Iconic Spots & Uniquely Michigan Experiences — Perplexity Deep Research (March 2026) (trust 6.5/10)
Reference	—
Document hash	pending evidence-pack link
Provenance chain
Claim ID	c0feaa5c-cd1d-4bb3-83c7-93ad0ac0071a