Boone Lake is a great spot for swimming, boating, and fishing.
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Boone Lake is really two river systems in one lake — the Watauga Arm and the South Fork Holston Arm, meeting at the dam. We test nine sites every week, mid-week, year after year, so results reflect consistent trends rather than a single moment. Tap a row for more on that site.
of all readings this season (218 of 242) have come back GREEN — 28 consecutive weeks of testing at the same nine sites, every week, so far this year.
A quick, ranked summary for your activity, by site, arm, or the whole lake — plus how conditions have trended this season, not just this week's snapshot. Want the full picture for a site? Open "More details" below any row for its temperature, clarity, and other charts.
Trends and sparklines are based on aggregating sample results collected each week. Sites are ranked best to worst for the selected activity.
Boone Lake Association's volunteer water quality team checks conditions at nine sites every week, so you can plan your visit with confidence. Members get the "Plan Your Visit" tool above year-round — ranked sites and season trends for their favorite activity, delivered every week. It's free for everyone until the 2027 member launch as a thank-you for a great season.
Everything below is standing methodology — not a weekly data point.