USDA Forest Service · Idaho

Grayback

USDA Forest Service · Idaho, United States

Open on the map Drive there Reserve Directions
Sites
14
Hookups
14 with water, 14 no hookups
Season
May 21 to September 26
Max RV length
85 ft
Group sites
Yes
Drinking water
Yes
Restrooms
Yes
Pets
Yes
Elevation
3,953 ft
Dark sky
Bortle class 1
Cell coverage
T-Mobile weak · AT&T weak · Verizon good (carriers' 4G LTE filings to the FCC, 2025-12; not measured here)
Access road
GRAYBACK GULCH CG (NFSR 347A) · asphalt · suitable for passenger cars
Lake
Boise National Forest
Nearest town
IDAHO CITY
Address
PO Box 129, IDAHO CITY, ID, 83631
Phone
208-392-6681
Activities
Camping, Fishing, Hiking, Hunting, Ranger Station, Wildlife Viewing

14 numbered sites are mapped one by one - open the site map to pick yours.

About

Overview

Grayback Campground is located 36 miles northeast of Boise, Idaho, just off scenic Highway 21. Historic Idaho City is just two miles north of the campground. Visitors enjoy fishing in Mores Creek and exploring the Grayback Gulch Trail.

Recreation

Mores Creek can be accessed just below the campground. Anglers fish for whitefish and rainbow trout. Grayback Loop Trail begins within the site, offering a 1-mile footpath for hikers.

Numerous trail opportunities are in the area just north of Idaho City, where hiking, biking, horseback riding and off-road vehicles can be enjoyed. During the winter, the area becomes a playground for back country skiers and snowmobiles.

Facilities

The group campground contains two group sites with picnic and serving tables, grills, campfire circles and paved site pads. Site A can accommodate up to 150 people and 20 vehicles, and site B can accommodate up to 100 people and 15 vehicles. Both sites can be reserved at the same time, for even larger groups. The group sites share one accessible bathroom facility that has a men's and women's side, each with four stalls. There is also an accessible hand pump for drinking water and a dumpster that is shared between the two sites.

The campground hosts 15 single sites and 3 double sites, each equipped with a paved parking spot, picnic table, lantern hook, and campfire ring. Three vault toilets, a two accessible hand pumps for drinking water, and dumpster are provided in the campground. Sites 2, 4, 7, 8, 11, and 15 are not listed on Recreation.gov and are first-come-first-serve.

Natural Features

The campground is situated on a hillside about a quarter-mile above Highway 21, at an elevation of 4,200 feet. A Ponderosa Pine forest covers the site, offering partial shade. Wildlife and summer wildflowers are abundant in the area. Mores Creek flows nearby, down the hillside from the campground

Contact Info

This location is unstaffed. To speak with our main office for general information, please call: (208) 392-6681.

Nearby Attractions

Highway 21, also known as the Ponderosa Pine Scenic Byway, snakes along Mores Creek to Mores Creek Summit, Gold Fork and Banner Ridge, offering historic sites, hot springs pools and breathtaking views of the surrounding mountains and forest along the way to the campground.

The campground is only 2 miles away from historic Idaho City, which is an old gold mining town that hosts multiple restaurants, bars, shops, a vistor center, and a museum.

Weather, month by month

MonthTypical highTypical lowColdest nightHottest dayYears with a night below 32°F
January36°19°-2°50°11 of 11
February38°23°-6°51°11 of 11
March46°28°16°69°11 of 11
April49°30°16°72°10 of 11
May63°42°29°81°1 of 11
June73°50°34°90°0 of 11
July88°60°45°99°0 of 11
August87°59°49°97°0 of 11
September74°49°40°89°0 of 11
October61°39°23°78°5 of 10
November49°30°5°66°9 of 10
December37°18°2°53°10 of 10

Mid-month figures from 2016–2026 of daily weather at this spot (ERA5 reanalysis via Open-Meteo, CC BY 4.0), in °F. Typical is the median; coldest and hottest are the extremes seen.

Nearby campgrounds

All public campgrounds in Idaho · Every state and province · Facts read from the operator 2026-03-11. Confirm fees, rules and current status with the operator before you go.