Idaho’s natural resources span water and hydropower on the Snake River, silver and critical minerals in the northern mountains, roughly 21.9 million acres of forest, volcanic farmland that grows about a third of the nation’s potatoes, large elk and deer herds alongside ESA-listed salmon runs, and a growing mix of wind, solar, and geothermal generation. Most of it sits on federal land or depends on federally built water infrastructure, and nearly all of it is governed by Idaho’s prior appropriation water doctrine. That combination shapes how the resources get used and who decides.
Water and Hydropower
Mountain snowpack is the starting point. It feeds surface flows and recharges the aquifers that supply agriculture, cities, and power plants across the southern plain. The Snake River runs more than 1,000 miles from near Yellowstone across southern Idaho to the Columbia. The Bureau of Reclamation manages 27 dams and reservoirs on the Snake system, holding roughly 6.8 million acre-feet of active storage and supplying more than 30,000 farms.1Bureau of Reclamation. Snake River Area Office Dams, Projects Other federal agencies, Idaho Power, and smaller utilities operate many more.
Underneath lies the Eastern Snake River Plain Aquifer, one of the most productive groundwater systems in North America. The U.S. Geological Survey estimates the upper 200 feet of the basalt aquifer holds between 80 and 120 million acre-feet.2U.S. Geological Survey. Summary of the Snake River Plain Regional Aquifer-System Analysis in Idaho and Eastern Oregon Total storage across the full thickness may reach as high as one billion acre-feet.3Idaho Department of Water Resources. The Eastern Snake River Plain Aquifer Spring discharge from the aquifer feeds the Snake directly, so groundwater and surface flow move together.
High flows and steep drops produce hydropower. Idaho Power runs 17 hydroelectric plants on the Snake and its tributaries with nearly 1,800 megawatts of combined capacity.4Idaho Power. Hydroelectric Plants It is the utility’s largest resource and a reason Idaho’s electricity rates stay among the region’s lowest.5Idaho Power. 2023 IRP Part I Snake River and Hydro Overview Handout Statewide, hydro provides nearly half of all utility-scale generating capacity.6U.S. Energy Information Administration. Idaho State Energy Profile
Minerals and Mining
The Gem State nickname reflects an unusually wide mineral endowment. Mining is concentrated in a few districts with very different economic roles.
The Coeur d’Alene district in Shoshone County, known as the Silver Valley, is one of the most productive silver districts in the world.7Idaho Geological Survey. Critical Mineral Atlas of Idaho Hecla’s Lucky Friday Mine still produces millions of ounces of silver each year, with lead, zinc, and copper coming out of the same sulfide veins. A single mine typically yields several marketable metals at once.
In the southeast, phosphate rock is the headline product. The Phosphate District supplies the raw material for fertilizer, which ties Idaho mining directly to U.S. food production.
Idaho also hosts minerals the federal government classifies as critical. The Idaho cobalt belt in the Blackbird district of Lemhi County contains the only domestic deposits that have produced cobalt as a primary product. The Stibnite district in Valley County historically produced nearly 40,000 metric tons of antimony and remains a target for new development, and antimony also comes out of the Silver Valley as a byproduct of silver mining.7Idaho Geological Survey. Critical Mineral Atlas of Idaho
Forests and Timber
Forests cover about 21.9 million acres, roughly 41% of Idaho. About 80% of that is federal, managed mostly as National Forests.8U.S. Department of Agriculture, Forest Service. Forests of Idaho, 2021 FIA Annual Snapshot That ownership pattern defines the timber economy: the trees are everywhere, but who gets to cut them is largely a federal decision.
Douglas-fir is the most widespread commercial species, with ponderosa pine common in drier southern forests and western white pine, lodgepole pine, and grand fir filling in. Annual harvest has run near one billion board feet, led by private industrial lands, followed by state endowment lands, with National Forest volume rising under collaborative stewardship agreements.
Timber sales and leases on state endowment lands feed a trust that benefits public schools. In 2022, the Idaho Department of Lands and the Idaho Endowment Fund Investment Board sent more than $55 million to Idaho public schools from that trust.9Idaho Forest Products Commission. Endowment Funds And Schools The State Board of Land Commissioners is charged with managing these lands to maximize long-term returns for beneficiaries.10Idaho State Legislature. Idaho Code Title 58, Chapter 1, Section 58-104 – State Land Board Powers and Duties
Wildfire is the dominant pressure on the resource. Heading into the 2026 season, Idaho’s wildfire suppression fund sat at roughly $15 million, with nearly $5 million in fixed costs expected before a single fire is fought. Governor Brad Little said once helicopter contracts, crews, and equipment are counted, the state will spend well over $10 million before active suppression begins. The Legislature appropriated $40 million to the fund in the 2025 session, short of the $60 million the governor requested. Dollars spent on suppression are dollars not available for the thinning and treatment work that reduces future fire risk.
Forest material also feeds a small energy sector. Idaho produces over 75,000 tons of wood waste a year from forests, mills, and urban sources, supports three dedicated biomass electricity facilities, and had 84 megawatts of installed biomass capacity as of its most recent reporting period.11Energy and Mineral Resources. Bioenergy Biomass generated about 3.4% of state electricity that year.
Farmland and Volcanic Soil
Much of southern Idaho sits on volcanic soil deposited along the Snake River Plain. The soil is rich in trace minerals and loose enough to drain well, which suits root crops. Idaho grows roughly 32% of the U.S. potato supply, leading the country.12U.S. Department of Agriculture, National Agricultural Statistics Service. Potatoes 2024 Summary13Idaho State Department of Agriculture. About Idaho Agriculture14U.S. Department of Agriculture, National Agricultural Statistics Service. 2024 Idaho Annual Statistical Bulletin Agribusiness overall accounts for roughly a fifth of state economic output, the single largest sector.
Almost none of this works on rainfall alone. Southern Idaho is arid, and commercial yields depend on irrigation drawn from the Snake, its tributaries, and the Eastern Snake River Plain Aquifer. Farm irrigation uses the largest share of the state’s water, and competition among irrigators, growing cities, and environmental flow requirements is a running tension in state water policy.
Wildlife and Fisheries
Idaho’s backcountry supports some of the largest big game populations in the lower 48. Idaho Fish and Game considers the elk herd healthy and relatively stable, with hunters taking nearly 21,000 elk in 2024. Mule and white-tailed deer herds are growing in most areas, with combined deer harvest topping 44,000 that year.15Idaho Department of Fish and Game. 2025 Deer/Elk Hunting Outlook The fall general season drives significant economic activity in rural communities.
Fisheries are mixed. Idaho leads the country in farmed trout, and its cold streams and lakes support wild trout fishing. The anadromous runs are a different story. Snake River sockeye salmon, chinook salmon, and steelhead trout are all listed under the Endangered Species Act, and recovery is tangled up with the same dam infrastructure that produces the state’s hydropower and irrigation water. A February 2026 court ruling granted emergency measures for Snake and Columbia River salmon, pushing the debate forward.
Wind, Solar, and Geothermal
Hydropower dominates, but other renewables are growing. Wind capacity sits at about 1,100 megawatts and produced roughly 15% of state electricity in 2024.6U.S. Energy Information Administration. Idaho State Energy Profile Idaho’s largest solar farm, a 200-megawatt facility, began operating in early 2025, with more projects in the pipeline.
Volcanic geology gives the state strong geothermal potential. Hot springs and geothermal heat have long been used in aquaculture, greenhouses, and district heating. Idaho’s only commercial geothermal power plant, a 10-megawatt facility in south-central Idaho that came online in 2008, was the first in the Pacific Northwest.6U.S. Energy Information Administration. Idaho State Energy Profile Most of the geothermal resource remains undeveloped.
How Idaho Manages These Resources
Water is governed by prior appropriation. The first person to divert water and put it to beneficial use holds the senior right, and when supplies are short, seniors are satisfied before juniors get anything. Rights to divert and use water must be acquired and confirmed under state statute.16Idaho State Legislature. Idaho Code Title 42, Chapter 2, Section 42-201 – Water Rights Acquired Under This Chapter In drought years, junior agricultural rights can be curtailed to protect senior rights and minimum stream flows.
Land management is shaped by federal ownership. With the federal government holding 80% of forested acreage and running vast rangelands through the Bureau of Land Management, choices made in Washington feed directly into Idaho’s timber, grazing, mining, and recreation economies. State endowment lands are managed by the State Board of Land Commissioners with a legal duty to maximize returns for trust beneficiaries like public schools, and that duty sometimes pulls against federal conservation priorities on neighboring ground.10Idaho State Legislature. Idaho Code Title 58, Chapter 1, Section 58-104 – State Land Board Powers and Duties
Habitat rules add another layer. The greater sage-grouse, a species that has so far avoided ESA listing, depends on intact sagebrush steppe across southern Idaho. The Idaho Department of Lands maintains a conservation plan that sets management guidelines on endowment trust lands covering fire prevention, habitat restoration, infrastructure, mineral leasing, and livestock grazing in sage-grouse habitat.17Idaho Department of Lands. Greater Sage-Grouse Conservation Plan Those restrictions can limit revenue activities on state lands, which is the tradeoff running through almost every resource decision in Idaho: short-term returns against long-term sustainability of the resource itself.