See all 3 routes on Cahaba River
Alabama | Birmingham / Upper Cahaba Blueway
Cahaba RiverMoon River access to Grants Mill access
A popular upper Cahaba Blueway float from the Moon River stone-step access to the improved Grants Mill launch near Birmingham.
Checking current river conditions…
Route location
Loading the route snapshot. This usually takes a few seconds.
Need to know
Why this call
Route overview
Trip details
Access rules, camping, seasonal conditions and trip length.
Distance, difficulty, rules and camping
Plan ahead
Tomorrow and the weekend
Forecasts can change. Check current conditions again before leaving.
Waiting on forecast.
Waiting on forecast.
Before you go
Water levels for Moon River to Grants Mill
The Mountain Brook gauge helps plan this trip, but a reading above the minimum does not guarantee suitable conditions.
100 cfs is a minimum, not an ideal level
Cahaba Blueway lists 100 cfs as the minimum for this trip. It does not give a preferred range or an upper limit. Check current conditions even when the gauge is above 100 cfs.
Plan the approach and shoals
Allow for the carry and stepped entry at Moon River. Review the drops and shoals before committing to the 5.1-mile trip.
Finish at the improved landing
Use the documented Grants Mill access. Extending downstream changes the itinerary and needs a separate plan.
Guides and maps checked . We have not inspected this trip in person. Check with the launch manager for current access and closures.
Plan
Plan your trip
Launch points, shuttle details, distance, and access notes.
Route logistics
Access and shuttle
A popular upper Cahaba Blueway float from the Moon River stone-step access to the improved Grants Mill launch near Birmingham.
Access map
Put-in
Moon River Canoe Launch, US 78Use documented Cahaba Blueway accesses only.
Take-out
Grants Mill canoe launchStay on the water around private banks and gravel bars.
Road shuttle
Access notes and hazards
Access caveats
- Use documented Cahaba Blueway accesses only.
- Stay on the water around private banks and gravel bars.
- Keep the US 280 route endpoint upstream of the low-head dam and bridge hazards.
- Recheck gauge, trend, rain, wood and access status on launch day.
Watch for
- Mountain Brook gauge and storm rises
- Shoals, submerged rocks and strainers
- Private banks and US 280 dam
Plan this paddle
Choose your trip times
No account needed. Check the selected access points above, then choose both dates and times. For an overnight paddle, set take-out to the following date.
Times use the selected time zone. Check it against the river’s location before saving or sharing.
Browser plans stay on this device. Sharing opens your device’s share tools or gives you text to copy.
Download GPX Route geometry only; no schedule required.
Conditions
Water levels, gauge history, and hourly forecast
Check how the river is changing and what weather to expect.
USGS measurements
More about this gauge
These measurements come from the gauge station. Water depth and current can differ along your trip.
River camera · USGS
View at the gauge
Cahaba River near Mountain Brook, AL. This view may be outside your paddling reach. Images are periodic and do not establish safe conditions.
Gauge detail
Water-level history and forecastDetailed view
Gauge
Recent trend
Checking preferred range.
Checking trend.
Gauge source
--Checking timestampWeather
Hourly forecast
Checking weather.
Loading today's forecast.
Next 8 hours
Short-route forecast
Checking the next several hours.
Route gallery
Photos
Check each caption: some photos show the surrounding area rather than this exact trip.
Score & sources
Why this score
See the gauge, weather, and source notes behind today’s call.
Why this scoreData reliability: checking
This rating reflects whether the gauge measures this part of the river, whether published water-level guidance is available, and how recently the data was updated.
- Checking data sources and update times.
- Checking evidence cautions.
Data behind the scoreWater levels, published guidance and update times
These readings and published water-level limits help explain today’s score.
| Gauge site | Cahaba River near Mountain Brook, AL |
| Discharge | Checking |
| Gauge height | Checking |
| 24h trend | Checking |
| 24h change | Checking |
| Current band | Checking |
| Rain last 24h | Checking |
| Rain last 72h | Checking |
| Air temp | Checking |
| Water temp | Checking |
| Wind | Checking |
| Gusts | Checking |
| Rain timing | Checking |
| Preferred range | Needs paddler reports |
| Known low-water floor | 100 cfs |
| High threshold | Water-level guidance unavailable |
| Evidence strength behind the range | Local route guidance |
| Gauge observed | Checking |
| Paddle Today updated | Checking |
| Main source behind this score | Cahaba Blueway named-reach guidance |
| Gauge source | Checking |
| Weather source | Checking |
| Rainfall source | Checking |
NotesWhat to know before you go
These notes cover the access details, route quirks, and source caveats most likely to matter once you get there.
- Named Blueway segmentMoon River access to Grants Mill access
Cahaba Blueway documents the named access points, distance and reach-specific paddling hazards.
- Low-water minimum100 cfs minimum only
Cahaba Blueway publishes a 100 cfs minimum at the Mountain Brook gauge for Moon River to Grants Mill. This is low-water guidance only: no preferred range or high-water ceiling is established here. A higher reading does not confirm that the shoals, current or obstructions are suitable.
- GaugeUSGS 02423380 near Mountain Brook
Same-river station context for this Blueway trip; observed discharge is not a measurement of local depth, an obstruction inspection or high-water clearance.
Verify it yourselfCheck the source links
Use these links to double-check the gauge, route details, and access notes before you head out.
Paddler reports
Recent notes from paddlers
A few quick notes from people who were on this route recently.
Reports
Paddler reports
See recent photos and notes from people on the route.
Share your trip
Keep exploring
More routes to check next
Compare another stretch on this river, or explore different rivers within 75 straight-line miles.
Quick answers
Cahaba River paddling FAQ
What water level is best for the Moon River access to Grants Mill access route on the Cahaba River?
Paddle Today watches Cahaba River near Mountain Brook, AL and uses 100 cfs as the conservative low-water floor for this route. The ideal range still needs more paddler reports.
Where does the Moon River access to Grants Mill access route on the Cahaba River start and end?
This route starts at Moon River Canoe Launch, US 78 and ends at Grants Mill canoe launch, about 5.1 river miles on the water.
Is the Moon River access to Grants Mill access route on the Cahaba River suitable for beginners?
This is listed as a moderate route. Expect more planning than an easy float, and use the live score, route notes, and source links before committing.
Flag a change
See something outdated?
Access, hazards, wood, and shuttle details change. Send a quick correction if something looks off.