Grand River Flow Today
As of October 2, 2026 at 2:30 AM, the Grand River is flowing at 32,800 cfs near Sumner, MO and up 494% in 24 hours. 10 of 12 USGS gauges reported in the last 3 days; flows range from 3.9 to 32,800 cfs. ❤ Favorite
Grand River map
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Every gauge, dam and paddle run on the river, one tap each:
- Gauges now — which reaches are high or low
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Grand River conditions today
Where the river is running versus normal, what’s rising or dropping, and what it means for a trip — built from the live USGS readings below.
At Sumner, the Grand River is running 32,800 cfs, up 494% since yesterday. Along the river, 7 of 8 reporting gauges are above normal (the typical gauge is at 176% of normal).
In the last 24 hours the river is rising at Sumner (+494%) and Jackson (+154%); dropping at Little Eagle Sd (-39%) and Painesville Oh (-13%).
Highest against normal: Jackson at 562%. Lowest: Painesville Oh at 34%.
Flood watch: Gallatin is at minor flood stage (28.63 ft); Sumner is at moderate flood stage (32.13 ft). Check NWS before heading out.
Paddlers: 0 of 4 runs on the Grand River with a live range are in range and 4 running high.
High water on the Grand River
Grand River Near Gallatin is at 28.63 ft — minor flood stage (flood stage 26.0 ft).
Grand River Near Sumner is at 32.13 ft — moderate flood stage (flood stage 26.0 ft).
How the Grand River compares to normal
Every reporting gauge from the top of the river to the bottom: bar length is today’s flow, colour is percent of normal for the date.
Flow along the river, upstream to downstream
- La Poudre Pass10,170 ft 3.9 cfs197%
- Little Eagle Sd1,640 ft 189 cfs236%
- Jackson911 ft 315 cfs562%
- Lansing808 ft 697 cfs234%
- Gallatin740 ft 25,100 cfs
- Portland719 ft 615 cfs147%
- Sumner636 ft 32,800 cfs
- Ionia620 ft 973 cfs144%
- Painesville Oh596 ft 29 cfs34%
- Grand Rapids587 ft 2,880 cfs155%
Bar length uses a square-root scale so small headwater flows stay visible next to big downstream ones. Colour: <50% 50–90 90–110 110–150 150%+ of normal.
Where every gauge sits
One dot per Grand River streamgauge, placed by its own percent of normal. The line is the typical gauge (176%).
Grand River flow report
| Streamgage | Streamflow | % of normal | 24h | Gage height | To flood stage | Elevation |
|---|---|---|---|---|---|---|
|
Grand River Ditch At La Poudre Pass CO
Oct 2, 1:45 AM · USGS 09010000 |
3.9 cfs | 197% | -13% | 0.24 ft | · | 10,170 ft |
|
Grand River At Little Eagle Sd SD
Oct 2, 3:15 AM · USGS 06357800 |
189 cfs | 236% | -39% | 3.35 ft | 11.7 ft below | 1,640 ft |
|
Grand River At Jackson MI
Oct 2, 2:30 AM · USGS 04109000 |
315 cfs | 562% | +154% | 11.61 ft | · | 911 ft |
|
Grand River Near Eaton Rapids MI
Last reported Mar 10 · USGS 04111000 |
1,290 cfs | · | · | 4.79 ft | · | 855 ft |
|
Grand River At Lansing MI
Oct 2, 2:00 AM · USGS 04113000 |
697 cfs | 234% | +44% | 3.90 ft | 7.1 ft below | 808 ft |
|
Grand River Near Gallatin MO
Oct 2, 2:45 AM · USGS 06897500 |
25,100 cfs | · | +49% | 28.63 ft | Flooding | 740 ft |
|
Grand River At Portland MI
Oct 2, 2:00 AM · USGS 04114000 |
615 cfs | 147% | +35% | 6.30 ft | 5.7 ft below | 719 ft |
|
Grand River At Chillicothe MO
Last reported Feb 1 · USGS 06899680 |
361 cfs | · | · | 6.97 ft | flood 24.0 ft | 686 ft |
|
Grand River Near Sumner MO
Oct 2, 2:30 AM · USGS 06902000 |
32,800 cfs | · | +494% | 32.13 ft | Moderate flood | 636 ft |
|
Grand River At Ionia MI
Oct 2, 2:45 AM · USGS 04116000 |
973 cfs | 144% | +24% | 8.91 ft | 12.1 ft below | 620 ft |
|
Grand River Near Painesville Oh OH
Oct 2, 3:00 AM · USGS 04212100 |
29 cfs | 34% | -13% | 1.62 ft | 10.9 ft below | 596 ft |
|
Grand River At Grand Rapids MI
Oct 2, 2:00 AM · USGS 04119000 |
2,880 cfs | 155% | +38% | 2.93 ft | 15.1 ft below | 587 ft |
USGS provisional data. Readings are in each gauge’s local time; gauges silent for more than 3 days are marked “Last reported”. Tap any gauge for its hydrograph, forecast and history.
Paddle runs on the Grand River
Each run is checked against its runnable range using the gauge it is keyed to (or the nearest gauge on this river).
| Run | Status | Flow now | Runnable range | Class |
|---|---|---|---|---|
| Begins 0.5 Miles Away From Trail Ridge Road To Ends Where River Segment Exits Rocky Mountain National Park Gauge: La Poudre Pass |
Running high | 3.9 cfs | 0–0 cfs typical | III |
| Headwaters To Boundary Of Rocky Mountain National Park Gauge: La Poudre Pass |
Running high | 3.9 cfs | 0–0 cfs typical | II–III |
| Headwaters To Fan Lake Gauge: La Poudre Pass |
Running high | 3.9 cfs | 0–0 cfs typical | · |
| Headwaters To Ends 0.5 Miles Upstream From End Of Fern Lake Road Gauge: La Poudre Pass |
Running high | 3.9 cfs | 0–0 cfs typical | III–IV |
Grand River streamflow over time
Daily total flow across every monitored gauge on the river.
Maximum streamflow by year
Grand River
The Grand River is a 300-kilometer long river that runs through southern Ontario, Canada. It was an important waterway for Indigenous peoples and European explorers and was later used for transportation and industry. The river originates in the highlands of Dufferin County and flows into Lake Erie at Port Maitland. The river’s hydrology is affected by numerous tributaries and reservoirs, including the Conestogo, Speed, and Eramosa rivers, and the Elora and Guelph Lake reservoirs. There are also several dams along the river, including the Shand Dam and the Guelph Lake Dam. The Grand River is used for water supply, flood control, and hydroelectric power generation. It is also a popular destination for recreational activities such as fishing, boating, and camping. The river is also home to several agricultural operations, including dairy farms and crop production.
About the Grand River
How is the Grand River flowing right now?
As of October 2, 2026, the Grand River is flowing at 32,800 cfs near Sumner, MO. Across its 12 USGS gauges, current flows range from 3.9 to 32,800 cfs. Every gauge’s live reading is in the table above.
Is the Grand River running high or low?
The typical gauge on the Grand River is at 176% of normal for the date. Above 100% means higher than the historical average for this calendar day; below 100% means lower. The profile above shows which reaches are high or low.
What is flood stage on the Grand River?
The National Weather Service sets flood stages for Little Eagle Sd (15.0 ft), Lansing (11.0 ft), Gallatin (26.0 ft), Portland (12.0 ft), Chillicothe (24.0 ft), Sumner (26.0 ft), Ionia (21.0 ft), Painesville Oh (12.5 ft), Grand Rapids (18.0 ft). The table shows how far each gauge is below its flood stage right now.
Is the Grand River runnable for paddling today?
Each run in the paddle table is checked against its runnable range using its gauge's live flow.
Where does the data come from?
Discharge and gage height are from the USGS National Water Information System; flood stages from the National Weather Service. The history chart sums every monitored gauge on the river.
Can I get alerts for a gauge?
Yes — open any gauge from the table, favorite it in the Snoflo app and set a flow threshold.