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Shore entry

Turkey Ridge Dive Site (Yokum Quarry)

Iowa, United StatesDirections
Open Water suggested2–11 m (5–35 ft) depthShore entry

Turkey Ridge Dive Site (Yokum Quarry) at a glance

Turkey Ridge Dive Site (Yokum Quarry) is a shore dive site in Iowa, United States with depths of 1.5–10.7 m (5–35 ft). Typically most favorable Sep · from 3 years of archive data. Divers commonly see Largemouth bass, Crappie, and Bluegill. Check the latest conditions and entry details before you go.

Next window today· 8:00–19:00 · favorable · sunset 18:12

Wind forecast for this hour · 7:00 · run 7 h ago
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Tap a factor for its source and model point

Site hazards: Silty bottom if finning carelessly; cold water below thermocline

Read the full hazards ↓

Dive windows this week

Sun8:00–19:00 favorable

5 kn wind (5 kn wind)

Mon8:00–9:00 favorable, 9:00–10:00 moderate, 11:00–13:00 moderate, 13:00–19:00 favorable

9 kn wind (9 kn wind)

Tue8:00–12:00 moderate, 12:00–16:00 favorable, 16:00–17:00 moderate, 17:00–18:00 favorable, 18:00–19:00 moderate

10 kn wind (10 kn wind)

Wed8:00–9:00 moderate, 10:00–12:00 moderate, 12:00–16:00 favorable, 16:00–19:00 moderate

10 kn wind (10 kn wind)

Thu8:00–19:00 favorable

5 kn wind (5 kn wind)

Fri8:00–9:00 moderate, 10:00–13:00 moderate, 13:00–17:00 favorable, 17:00–19:00 moderate

5 kn wind (5 kn wind)

Sat8:00–10:00 moderate, 10:00–16:00 favorable, 16:00–17:00 moderate, 17:00–19:00 favorable

8 kn wind (8 kn wind)

Favorable windowModerate window— no window

Every forecast dive window each day, site-local time, from wind forecasts. Numbers under each bar are daylight averages.

First light 7:06 · Sunrise 7:35 · Sunset 18:12 · some windows run past sunset

Source: Open-Meteo wind · updated 25 Oct, 00:27 GMT-5

Forecast only — always assess conditions on site.

Compare this weekend’s windows near Turkey Ridge Dive Site (Yokum Quarry)

Recent diver reports

Dated firsthand observations from divers — not current conditions.

No diver reports for this site yet. — one dated observation helps every diver after you.

Dived here today — did the forecast match?

What Divers Say

Known for: Largemouth bass, Bluegill
Best time: Late spring through fall

Based on community reviews and site data. Conditions vary — always verify before diving.

Best months, historically

What conditions have historically been typical at this site, month by month — not a forecast.

  1. January, 80% of days have historically been favorable, wind has typically been 11 knots
  2. February, 71% of days have historically been favorable, wind has typically been 13 knots
  3. March, 56% of days have historically been favorable, wind has typically been 13 knots
  4. April, 37% of days have historically been favorable, wind has typically been 15 knots
  5. May, 70% of days have historically been favorable, wind has typically been 12 knots
  6. June, 72% of days have historically been favorable, wind has typically been 11 knots
  7. July, 90% of days have historically been favorable, wind has typically been 9 knots
  8. August, 91% of days have historically been favorable, wind has typically been 10 knots
  9. September, 92% of days have historically been favorable, wind has typically been 10 knots, historically most favorable
  10. October, 65% of days have historically been favorable, wind has typically been 13 knots
  11. November, 73% of days have historically been favorable, wind has typically been 12 knots
  12. December, 83% of days have historically been favorable, wind has typically been 11 knots

September has typically had the largest share of favorable days here. Conditions vary year to year — this is historical context, not a forecast.

Based on 3 years of archive data. Bar height shows the share of days each month whose conditions have historically scored favorably.

Marine life seen at this site

Species noted at this site — not a promise of what you’ll encounter.

Species seen here

Rough labels: “Commonly seen” usually means two or more recorded sightings near this site in public dive logs (GBIF), “Occasionally seen” one; “Seasonal” and “Rarely seen” come from dive-guide research. Not a measured rate.

Fills & rentals nearby

No dive shops mapped within 25 km (16 mi). Know one? Add it to the map.

Data updated July 2026

Site details

A small flooded limestone quarry in the Turkey Ridge Wildlife Area southwest of Janesville, north of Cedar Falls, managed as a public dive site. It has scuba staging platforms on shore, an underwater training platform at about 17 ft, and DNR-sunk fish cribs. Maximum depth is roughly 31-35 ft with average visibility of 16-20 ft.

shore

Silty bottom if finning carelessly; cold water below thermocline

Reviews

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