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California›Trinity County

Mad RiverCA

A town settled in 1872, now home to 272 people.

Is Mad River a good place to live?

Mad River’s typical journey to work is 10 minutes, where California’s towns sit at 28 minutes and U.S. towns at 25 minutes. 54% of the land in Mad River is conserved, where California’s towns sit at 4.3% and U.S. towns at 4.3%. Mad River has fewer than 1,000 residents, too few for fair grades; the figures below are still real.

Small town

272 people, and everyone knows the way

In a town this size, neighbors are the best guide. Ask them anything.

Historic American Buildings Survey Roger Sturtevant, Photographer Mar. 11, 1934 FRONT ELEVATION - Erickson Ranch House,…
Historic American Buildings Survey Roger Sturtevant, Photographer Mar. 11, 1934 FRONT ELEVATION - Erickson Ranch House,…
Mad River’s story

154 years in pictures

The archive holds 4 old photos and papers and 4 maps from 1949 on.

  • 1872Mad River is settled
Explore the history →
Getting set up

Moving to Mad River: who provides what

Mad River is unincorporated, so Trinity County and regional agencies provide most services.

PowerTrinity Public Utilities DistEIAHIFLD · EIA
InternetProviders and speedsData pending · D4
Trash & county servicesTrinity CountyTrinity County provides services here
SchoolsSouthern Trinity Joint Unified School DistrictWhich school depends on your addressNCES
Register to voteOnlineIn California you can register online until 15 days before Election Day, in person up to and including Election Day, or by mail (postmarked 15 days before).vote.gov
Who runs elections hereTrinity County Clerk - ElectionsTrinity County; contacts on the Handbook page.FVAP, Jul 2019
ZIP codes95552, 9552695552 61% · 95526 39%Census 2020

EPA SDWIS (Oct 9, 2026) · HIFLD + EIA-861 2025 · Census 2020 ZCTAs · NCES 2024–25 · registration: vote.gov, updated Nov 18, 2024.

The data

Ordered by what stands out in Mad River.

Outdoors

nearly a third of the land in Mad River is protected from building

Mad River’s trail network density is 1.0 miles per square mile.

54.1%conserved
54.1%
conserved · 12,111 of 22,400 acres
37 mi
of trails · 1 per sq mi

Trails & parks © OpenStreetMap contributors · Conserved land: USGS PAD-US

Schools

The schools Mad River’s kids attend

The Southern Trinity Joint Unified school district runs its public schools. Two of the 3 schools are below, and why each made the list. 2 public schools serve Mad River, with 61 students in all.

SchoolLevelStudentsLetter
Van Duzen ElementaryLargest public elementary schoolGrades K–8Grades K–854B
Southern Trinity HighLargest public high schoolGrades 9–12Grades 9–127–

NCES · EDFacts

Natural hazards

Compared with most of California and the rest of the country, the FEMA risk score in Mad River is higher

Expected losses in Mad River break down as 48% from inland flooding and 38% from wildfires. One declared disaster, in 2020, has brought federal aid to Mad River households.

100risk score of 100
FEMA risk score
100Very high riskLowerHigher
Inland floodingWildfireEarthquakes
1
federal disasters paid out here

FEMA disaster declarations and aid · FEMA National Risk Index · OpenFEMA

Climate

Expect four seasons and hot summers in Mad River

In Mad River, the typical July afternoon high is 89°F.

89°summer high

Typical low → high °F

Winter33–48°
Spring37–63°
Summer51–86°
Fall43–69°
+1.4°
vs. the 20th-century average
89°
typical summer high

NOAA U.S. Climate Normals, 1991–2020

Health

Mad River stands out in California and nationally: a larger share of its adults smoke cigarettes

43% of adults have high blood pressure in Mad River. This California town beats the California average on 3 of 32 CDC measures and trails it on 20. Two figures for adults in the town: 20% report frequent physical distress, 31% say their health is fair or poor.

Mad RiverCalifornia townsU.S. towns
Smoke cigarettes (CDC PLACES)22%11%14%
Frequent physical distress (CDC PLACES)20%14%14%
Fair or poor health (CDC PLACES)31%22%19%
High blood pressure (CDC PLACES)43%31%35%
32 measures vs. California
3 better9 too close to call20 worse
What stands outMad RiverCA
Fewer uninsured adults8.5%10.6%
More adults screened for colon cancer63.4%57.5%
More adults with COPD12.7%5.1%
Jerold Phelps Community Hospital
27.8 mi away · emergency room
1 of 3
care shortages: mental health

CDC PLACES 2025 · modeled estimates for adults · CMS · HRSA

Housing

The median home in Mad River sells for about $192K

Among households in Mad River, 86% are owner-occupiers.

$192Kmedian sale price
1
homes sold in September

Census ACS, 2020–24 · Zillow Home Value Index · Redfin Data Center

Keep exploring

Everything we know about Mad River

16pages on Mad River
After high school

Colleges nearby

None within 15 miles of Mad River; the nearest are

About Mad River

Census-designated place in California, United States

Mad River (formerly Kuntz) is a census-designated place (CDP) in Trinity County, California, United States. Mad River is located in the southern part of the county. Mad River sits at an elevation of 2,484 feet (757 m). The ZIP Code is 95552. Its population is 361 as of the 2020 census, down from 420 from the 2010 census. Mad River has the last services on California State Route 36 until the Platina Store, 44 miles (71 km) away. Until it closed, the next services were the Wildwood Store, 5 miles (8.0 km) west of Platina. Its post office serves itself and the communities of Dinsmore (Humboldt County), and Van Duzen; both using 95552 as their ZIP code. Ruth residents with Post Office Boxes at …

From Wikipedia, licensed CC BY-SA 4.0 · facts via Wikidata (CC0)

Area
35 sq mi
Elevation
2,484 ft
ZIP code
95552

Questions about Mad River

Short answers, built from the data on this page.

Is Mad River, CA a good place to live?

Mad River has fewer than 1,000 residents, too few for fair grades; the figures below are still real.