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Recreation AreaRecreation.gov

Deerfield Reservoir

Hill City, South Dakota · Pennington County

Deerfield Dam and Reservoir, Rapid Valley Project, are twenty-five miles west of Rapid City, South Dakota on Castle Creek. Reservoir contains 400 surface acres and has 16 miles of shoreline. Public use area, camping, picnic areas, concession, swimming, boating, hiking, and fishing. Available species include rainbow tro…

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44.00608, -103.80021
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5-Day Forecast

Weather at Deerfield Reservoir

Live forecast for the park. Plan your visit accordingly.

Avg High89°F
Avg Low63°F
Peak Rain Chance33%
Humidity43%
UV (avg)8
Air Quality50 · Good
Today
🌦
Drizzle
93°/68°
💧 4%🌬 12mph
5:37 AM8:25 PM
Mon
☁️
Overcast
89°/64°
💧 10%🌬 13mph
5:38 AM8:24 PM
Tue
☁️
Overcast
87°/63°
💧 24%🌬 10mph
5:39 AM8:23 PM
Wed
🌦
Rain Showers
90°/60°
💧 33%🌬 13mph
5:40 AM8:22 PM
Thu
☁️
Overcast
87°/60°
💧 23%🌬 13mph
5:41 AM8:21 PM

Forecast data © Open-Meteo. Refreshed every 6 hours. Always check the most recent forecast before heading out.

About Deerfield Reservoir

Deerfield Dam and Reservoir, Rapid Valley Project, are twenty-five miles west of Rapid City, South Dakota on Castle Creek. Reservoir contains 400 surface acres and has 16 miles of shoreline. Public use area, camping, picnic areas, concession, swimming, boating, hiking, and fishing. Available species include rainbow trout, brown trout, and rock bass. Open year-round. Current Reservoir Levels.

Plan Your Visit to Deerfield Reservoir

Heading to Deerfield Reservoir? A few things to know before you go:

  • Reservations: popular sites fill up fast — check Recreation.gov 6 months in advance
  • Fees: day-use and camping fees vary; check current rates on the official park page
  • Trash & pack-out: follow Leave No Trace principles
  • Wildlife: store food in bear boxes where provided; never feed wildlife
  • Weather: the 5-day forecast above is updated every 6 hours; verify just before you go

Frequently Asked Questions

Do I need a reservation for Deerfield Reservoir?

No central reservation system listed for Deerfield Reservoir. Check the official page (https://www.recreation.gov/recarea/1165) for the latest entry policy and availability.

How do I get to Deerfield Reservoir?

Site is 25 miles west of Rapid City.

How do I contact Deerfield Reservoir?

You can reach the park at phone: 605-574-2534.