Paddle Report

Anderson Ranch Dam To Confluence With Mennecke Creek river run

Idaho, USA South Fork Boise River Class III-IV
Today high
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Tonight low
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Current flow
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% of normal
108%
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Linked streamgauge
-- cfs
Gauge height
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Anderson Ranch Dam To Confluence With Mennecke Creek -- Idaho paddle run
Anderson Ranch Dam To Confluence With Mennecke Creek Idaho · South Fork Boise River
About this run

Anderson Ranch Dam To Confluence With Mennecke Creek

The Whitewater River Run from Anderson Ranch Dam to Confluence with Mennecke Creek in Idaho is a popular destination for whitewater rafting and kayaking enthusiasts. The ideal streamflow range for this stretch of the river is between 800 and 2,000 cfs. The class rating for this section of the river is Class III, with some Class IV rapids present in certain areas. The total segment mileage for this river run is approximately 9 miles.

The river features several notable rapids, including the infamous "Lunch Counter" and "Big Kahuna" rapids. These two rapids are the most challenging sections and require technical skills. Other notable rapids include "Kraken" and "Boat Eater," which are smaller but still offer exciting rides. The river also features several boulder gardens and steep drops, adding to the thrill of the run.

As for specific regulations, all boaters are required to wear a personal flotation device (PFD) at all times while on the river. It is also recommended that all boaters have prior whitewater experience before attempting this run. Finally, boaters must obtain a permit from the Bureau of Land Management (BLM) before accessing the river.

Overall, the Whitewater River Run from Anderson Ranch Dam to Confluence with Mennecke Creek is a challenging and exciting rafting and kayaking adventure, with a range of rapids and obstacles to navigate. Boaters should be well-prepared and experienced before taking on this run.
StateIdaho
RiverSouth Fork Boise River
ClassIII-IV
Elevation3,840 ft
Current flow--
Percent of normal108%
StreamgageUSGS 13190500
Latitude43.4006°
Longitude-115.5814°
Detailed forecast

Plan your run down to the hour

Same weather feed Snoflo's iOS app uses -- updated continuously from NOAA / yr.no. Watch the precipitation column on the meteogram; rain ahead of a run typically lifts flows 12-48 hours later depending on the basin.

Hourly detail

Next 5 days, hour by hour

Temperature line with weather symbols on top, snow + rain accumulation as columns, humidity as a dotted line.

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Deep dive

5-day forecast table

Every 3 hours, broken out across temperature, snow, rain, humidity, and wind. Each cell is colour-coded relative to the column min/max.

TimeConditionTemp (°F)Snow (in)Rain (in)Humidity (%)Wind (mps)Wind dir
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Long-term outlook

15-day temperature & precipitation

Daily temperatures, snow, and rain projected over the next two weeks -- the upstream story that drives next week's flows.

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Regional flow

Regional streamflow levels

USGS streamgauges around Anderson Ranch Dam To Confluence With Mennecke Creek -- useful for spotting upstream pulses and gauging which tributary is contributing what.

Whitewater safety

Check the flow before you run
Use the linked-gauge card and Regional Flow panel above. Class ratings change with flow -- a Class III at low water can become Class IV+ at high water.
Know your skill ceiling
Pick runs comfortably below your ceiling. Cold-water and big-water runs raise the consequences of any mistake.
Wear the right gear
Helmet, PFD, drysuit / wetsuit when water is below 60°F. Throw bag, knife, and whistle on your person, not in the boat.
Scout, set safety, and run with a team
Scout new rapids on foot, set safety with throw bags above the consequence pool, and run with at least one other competent paddler.
Respect the river
Strainers, undercuts, low-head dams, and wood can kill at any class rating. When in doubt, portage.

Set push alerts in the Snoflo app

Save Anderson Ranch Dam To Confluence With Mennecke Creek as a favorite, set a discharge threshold (e.g. "alert me when flow hits 600 cfs"), and the iOS app pushes the moment the linked gauge crosses.

FAQ

About Anderson Ranch Dam To Confluence With Mennecke Creek

What's the optimal flow for Anderson Ranch Dam To Confluence With Mennecke Creek?

The optimal flow depends on the section and the craft. Check the Run Details panel for the linked gauge and current status.

How fresh is the cfs reading on this page?

The linked USGS streamgauge reports continuously (every 15 minutes); Snoflo refreshes throughout the day. Hover the streamflow sparkline to read individual datapoints.

What's the whitewater class?

See the Run Details panel for the class rating Snoflo tracks for this run. Class ratings change with flow -- a Class III at low water can become Class IV in high water.

Where do I put in / take out?

Tap Directions in the hero above to open driving directions to the put-in. For shuttle planning, check the Nearby Boat Launches panel and the river run operator's site.

Can I get alerts when flows hit the optimal range?

Yes -- alerts are managed in the Snoflo iOS app. Favorite this run, set a discharge threshold, and you'll get a push the moment the gauge crosses.