ColoradoReservoir, 11,686 acres
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3,805.88ft
Up 0.29 ft this week
Sailing
CheckingReading the forecast
Kayak and SUP
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Power boating
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Fishing
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Outlook. Monday: W wind 3 to 9 kt, gusts to 16 kt, high near 66°F. Tuesday: SSE wind 4 to 7 kt, gusts to 14 kt, high near 69°F.
7-day wind forecastLoads when you scroll here
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Last hour of NOAA MRMS radar, 1 km resolution. Map data © OpenStreetMap contributors, OpenMapTiles, OpenFreeMap.
3,805.88ft NGVD29
+0.29 ft in 7 days4.21 ft above the October normal
Reading from Oct 26, 2026. Shaded band: range of October averages on record; dashed line is the typical level.
John Martin Reservoir was at 3,805.88 ft on October 26, rising 0.29 ft over the past week. That is near normal for October: the typical October level is 3,801.67 ft, so the lake is 4.21 ft above its usual mark.
Background reading: John Martin Reservoir on Wikipedia
John Martin Reservoir covers about 11,686 acres in Colorado and is classed as a reservoir.
We read the level from USGS gauge 07130000, listed as John Martin Reservoir at Caddoa, CO. Wind and weather come from the National Weather Service grid cell over the lake, so the numbers describe open water rather than the nearest airport.
On a lake this size the wind has miles of open water to work with, so a 15 kt breeze can stack up a steep chop in the main basin while sheltered coves stay flat. Reservoir levels move with releases and inflow, so ramps and beaches can change week to week. The water level page tracks that day by day.
The go or no-go calls above are a starting point, not a guarantee. Read how we score conditions, and always check local rules and posted warnings before you launch.
The National Weather Service forecast for the lake from October 26: Monday: W wind 3 to 9 kt, gusts to 16 kt, high near 66°F. The panel at the top of this page refreshes the current wind, gusts and direction when you open it and turns them into a call for sailing, paddling, power boating and fishing.
John Martin Reservoir was at 3,805.88 ft on October 26, rising 0.29 ft over the past week. That is near normal for October: the typical October level is 3,801.67 ft, so the lake is 4.21 ft above its usual mark.
John Martin Reservoir covers about 11,686 acres (18 square miles) of surface water.
If John Martin is blown out, these are the closest alternatives. Tap through for their conditions.