U.S. Forest Service · Boise National Forest · Idaho

Spillway Campground

Overview. Spillway Campground is a small campground with 3 campsites along Anderson Ranch Reservoir. The reservoir is a popular destination for fishing, boating, waterskiing and riding personal watercraft. There is excellent fishing in the reservoir for smallmouth bass and kokanee. Also try your luck at fly fishing just below the dam for a trout! Rafting access is at Reclamation Village, just south of the campground.

More like this: first-come in Idaho

Spillway Campground
Photo from the area. Riverwild (CC BY-SA 3.0), via Wikimedia Commons

Season & status

SeasonEnd of May to End of September
ForestBoise National Forest
BookingThere are no reservations necessary. This campground has 3 sites and is on a first-come, first-serve basis.

Boise National Forest recreation page ↗

Weather by month

NOAA climate normals →
Weather by month near Spillway Campground10°20°30°40°50°60°70°January: 2.06 inches of precipitationFebruary: 1.22 inches of precipitationMarch: 1.17 inches of precipitationApril: 1.20 inches of precipitationMay: 1.28 inches of precipitationJune: 0.80 inches of precipitationJuly: 0.47 inches of precipitationAugust: 0.24 inches of precipitationSeptember: 0.52 inches of precipitationOctober: 1.05 inches of precipitationNovember: 1.26 inches of precipitationDecember: 2.72 inches of precipitationJanFebMarAprMayJunJulAugSepOctNovDecJanuary: 19.1°F averageFebruary: 21.8°F averageMarch: 31.4°F averageApril: 41.5°F averageMay: 50.0°F averageJune: 57.4°F averageJuly: 66.0°F averageAugust: 64.9°F averageSeptember: 56.3°F averageOctober: 44.4°F averageNovember: 31.4°F averageDecember: 20.5°F average0 in1 in2 in3 inTemp °FInches
The line is the average temperature and the bars are average precipitation at Hill City 1 W, 19 miles from the campground at 5,100 feet, station USC00104268 in the NOAA monthly climate normals for 1991 to 2020. Precipitation totals about 14 inches a year.

Getting there

From Mountain Home, Idaho travel northeast 21 miles along State Highway 20 to the Forest Service road 134 turnoff. Take the Forest Service road 134 north approximately 6 miles to the Anderson Ranch Dam and Spillway Campground is a stone's throw from the Dam.

Coordinates43.3572° N, 115.4475° W · Directions ↗

Fire nearby

  • Prescribed
    Paradise Rx

    37 mi from the campground

Distance is to the reported incident point, not the fire edge. Call the managing office before you drive.

Supplies & services

Dump stationDump station ↗3.4 mi
Outdoor gearBoise Gear Collective ↗41.9 mi
RV sales & serviceAmerican Trailer Sales ↗43.4 mi

Locations © OpenStreetMap contributors. Call ahead; hours change seasonally.

Explore

Worth a stop

  • 1.1 mi
    Wilson Flat #606 ↗
    6.9 mi trail · hiking, horse, bike, motorcycle and 2 more
  • 1.5 mi
    Wilson Flat #611
    0.8 mi trail · hiking, horse, bike, motorcycle and 2 more
  • 1.5 mi
    Wilson Flat #607
    3.4 mi trail · hiking, horse, bike, motorcycle and 2 more
  • 1.6 mi
    Wilson Flat #609
    2 mi trail · hiking, horse, bike, motorcycle and 2 more
  • 2.1 mi
    Wilson Flat #612
    0.3 mi trail · hiking, horse, bike, motorcycle and 2 more
  • 2.4 mi
    Wilson Flat #608
    0.4 mi trail · hiking, horse, bike, motorcycle and 2 more

Trail and trailhead records are the Forest Service's. Distances are straight-line to the nearer trail end. Trail conditions are not tracked here.

Public land it sits in

On Wilderness Atlas →

Boise National Forest begins about 11.9 miles away, and it is the closest of these.

Each unit is published as a centre point and an acreage rather than a boundary, so this section stands it in for a circle of the same area. Whether a campground is inside, and how far it is from one it is outside, are both approximate.

Guidebooks for Idaho

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Titles come from Open Library's catalog, matched by subject heading or by title.

Reference

Questions people ask

Do I need a reservation at Spillway Campground?

No. Spillway Campground is first-come, first-served. There are no reservations necessary. Sites are taken on arrival and paid at the fee station.

Source: Forest Service

What if Spillway Campground is full?

The nearest public campgrounds are Tailwaters Campground (1 mi, first-come), Evans Creek Campground (3.4 mi, first-come), and Castle Creek Campground (4.6 mi, first-come).

Source: Campgrounds nearby