--- title: "Wildfire Risk in Tuolumne County, CA 2026 | Satelife" description: "Wildfire risk in Tuolumne County varies a lot by location. In the places we scored, overall scores run from 37.1 in unincorporated Tuolumne County to 83.6 near Groveland, with a middle value of 68.1." image: "https://satelife.ai/images/wildfire-risk/tuolumne-county/generated/tuolumne-county-locator.webp" canonical: "https://satelife.ai/wildfire-risk/california/tuolumne-county/" --- [Home](/)›[Wildfire Risk](/wildfire-risk/)›[California](/wildfire-risk/california/)›Tuolumne County Tuolumne County, California # Wildfire risk in Tuolumne County: _where it is highest_, and why Wildfire risk in Tuolumne County varies a lot by location. In the places we scored, overall scores run from 37.1 in unincorporated Tuolumne County to 83.6 near Groveland, with a middle value of 68.1. [Score my Tuolumne County address →](#score-my-address) [How risky is this county? ↓](#risk-at-a-glance) Before 20002000s2010s2020sCommunity Tuolumne County — the largest fires on record, at their perimeter centres, with the county’s main communities. Select a marker for its detail. At a glance ## Half of Tuolumne County scores _High_ or worse We scored 156 points across Tuolumne County on the same 0–100 scale a Satelife address report uses, and they do not land in one place. 20% of them come out Very High, while 10% are Moderate. Which end your own parcel sits at is not something a county map can tell you. 20% 71% **Very High** 20% · 31 of 156 points **High** 71% · 110 of 156 points **Moderate** 10% · 15 of 156 points Safest end we measured 37.1 near unincorporated Tuolumne County · Moderate Middle of the county 68.1 High — half of Tuolumne County is above this Most exposed end we measured 83.6 near Groveland · Very High ### And the federal models agree it is a fire county Relatively High FEMA National Risk Index — wildfire risk rating · index score 99.3 / 100 $27.3M / yr FEMA NRI — expected annual loss from wildfire · rated Relatively High 1.01% USFS Wildfire Risk to Communities — mean annual burn probability · 90th-percentile cell 2.81% 6.21 ft USFS WRC — mean conditional flame length · 97% of the county carries burnable fuel FEMA NRI also rates Tuolumne County: all-hazards risk Relatively Moderate · social vulnerability Relatively Moderate · community resilience Relatively Moderate · annualised wildfire frequency 0.0124. Sources: FEMA National Risk Index 1.20.0 (Dec 2025), county record · USFS Wildfire Risk to Communities v2.0, mean of the grid cells inside the county. Both describe the county as a whole, never an address in it. What does your Tuolumne County address score? A county range shows the spread. Your parcel sits somewhere inside it — the report says where, and what to do about it. Free to request · PDF report with a 0–100 score, the drivers behind it, and a mitigation plan Local context ## What the data says about _Tuolumne County_ Most scored locations fall in the High tier: 110 points were High, compared with 31 in Very High and 15 in Moderate. No scored points fell in the Low tier. For county-wide context, FEMA’s National Risk Index rates Tuolumne County’s wildfire risk as Relatively High, and its wildfire expected annual loss as Relatively High. Fire record ## Where the fires _actually were_ The largest fire listed here is the Rim fire (2013), at 256,916 acres. The most recent large fire listed here is the 6-5 fire (2025), at 6,935 acres. Since 1984, 670,897 acres have burned in the county, which is 46.3% of the county. The Hamm fire (1987) is marked as partly in Tuolumne County. ![Rim Fire (2013) in Tuolumne County, California - Sgt. David Calderon, an aviation mechanic in the California Army National Guard’s Detachment 1, Company F, 2nd Battalion, 135th Ge](/images/wildfire-risk/tuolumne-county/photos/california-army-national-guard-aviation-mechanics-maintain-u.webp) **Rim Fire, 2013** — Tuolumne County. Photo: Spc. Nadine White · [Public domain](https://commons.wikimedia.org/wiki/File:California_Army_National_Guard_aviation_mechanics_maintain_UH-60_Black_Hawks_for_2013_wildfire_fight_130906-A-KH320-007.jpg) ![Donnell Fire (2018) in Tuolumne County, California - Eric Garcia, firefighter, in a field near a cabin covered with pink fire retardant in Stanislaus National Forest, California durin](/images/wildfire-risk/tuolumne-county/photos/180811-stanislaus-cmr-0395-43484688794.webp) **Donnell Fire, 2018** — Tuolumne County. Photo: Forest Service Photography · [Public domain](https://commons.wikimedia.org/wiki/File:180811-Stanislaus-CMR-0395_\(43484688794\).jpg) 492 mapped fire perimeters centred in the county since 1984 670,897 acres inside those perimeters since 1984 46.3% of the county's area, as a share of 5,867.5 km² 6-5 2025 most recent large fire on record Before 20002000s2010s2020s Fire perimeters coloured by decade. Select a perimeter for its name, year and size. Named fires on record - **Rim Fire**2013256,916 acres - **Donnell Fire**201836,461 acres - **Ackerson Fire**199659,151 acres - **Paper Fire**198745,020 acres - **Hamm Fire**198733,144 acres in totalcrossed into the county - **Quarry Fire**20238,645 acres - **Rogge Fire**199620,944 acres - **6-5 Fire**20256,935 acres Perimeter sources: NIFC Interagency Fire Perimeter History · WFIGS Interagency Perimeters · largest on record: Rim 2013. Perimeters are simplified for display; acreage is the figure the source records. Communities ## Where in the county you are _matters most_ Among named communities, Groveland has one of the higher typical scores at 76.9. Sonora is 72.7, and Tuolumne is 71.2. Columbia scores 69.3 and Twain Harte 66.4, while Jamestown is lower at 62.7. Compared with the county middle score of 68.1, several communities sit above that level and several sit below it, which matches the street-to-street variation seen across the county. Groveland village · 601 people 76.9 _Very High_ Sonora town · 4,648 people 72.7 _High_ Tuolumne village 71.2 _High_ Columbia village 69.3 _High_ Twain Harte village 66.4 _High_ Jamestown village · 3,433 people 62.7 _High_ The score is the median of the sampled points nearest that community — a community-scale indicator, not a score for any individual property in it. Population comes from the community's own record where the source carries one. Terrain & fuels ## Terrain, vegetation and _fuels_ Terrain contributes to higher wildfire risk in parts of Tuolumne County. Terrain scores range from 20.0 near Jamestown to 65.0 in Groveland, with a middle value of 55.0. Vegetation and fuels are also elevated in many places: scores run from 20.0 in Twain Harte to 80.0 near Groveland, with a middle value of 74.0. Fire weather was not measured at all for this county in the places we scored. What we do have countywide scoring for includes hazard-zone and fire-history factors, which have middle values of 73.2 and 70.0. 55 median terrain score (max 65 near Groveland) 74 median vegetation & fuels score (max 80 near Groveland) ![LANDFIRE existing vegetation type map of Tuolumne County, California, with the county boundary outlined](/images/wildfire-risk/tuolumne-county/generated/tuolumne-county-fuels.webp) LANDFIRE existing vegetation type across Tuolumne County — the same fuel data that feeds the vegetation layer of a Satelife property report. Fire weather ## Fire weather across _Tuolumne County_ Fire weather was not measured at the sampled points in Tuolumne County. The other four indicators on this page were, and the bars below show what they found. What drives it ## Which part of the risk _moves_, and which doesn't Risk is not even across the county. The lowest scored location is 37.1 in unincorporated Tuolumne County, while the highest is 83.6 near Groveland. That spread sits around a middle score of 68.1, so many neighborhoods are in a higher-risk band even though some spots score much lower. By tier count, High is the most common group with 110 scored points, followed by Very High with 31 and Moderate with 15. Each bar is what one part of the score covers across Tuolumne County, on the same 0–100 scale. A long bar is a part of the risk that depends on where you are; a short one is the same almost everywhere. Terrain 20–65 highest near Groveland Vegetation & fuels 20–80 highest near Groveland Hazard zone 10–94.5 highest near Twain Harte Fire history 5–95 highest near Jamestown Overall score 37.1–83.6 highest near Groveland The tick on each bar is the middle value. Tier boundaries — Moderate at 25, High at 50, Very High at 75 — are the faint lines behind them. Show every number behind these bars Layer Min Median Max Lowest place Highest place Points Terrain 20 55 65 near Jamestown Groveland 156 Vegetation & fuels 20 74 80 Twain Harte near Groveland 156 Hazard zone 10 73.2 94.5 unincorporated Tuolumne County Twain Harte 156 Fire history 5 70 95 unincorporated Tuolumne County near Jamestown 156 Composite 37.1 68.1 83.6 unincorporated Tuolumne County near Groveland 156 Independently of Satelife's layers, the USFS Wildfire Risk to Communities grid puts the county's mean annual burn probability at **1.01%** (90th percentile cell: **2.81%**), with a mean conditional flame length of **6.21 ft**. **97%** of the 20,767 grid cells inside the county carry burnable fuel at all. Source: USFS Wildfire Risk to Communities v2.0 (ImageServer, county extent). CAL FIRE has no mapped Fire Hazard Severity Zone at **114** of the 156 sampled points — the zones cover Local Responsibility Areas, and most of this county is state or federal land. At **113** of them the USFS grid above supplied the hazard reading instead; at the remaining 1 the hazard weight is renormalised away rather than scored as low. 156 sample points on a ~2.3 km grid, plus one at the centre of each community, weighted with the Satelife county profile v1 · median layer coverage 90%. Scores are 0–100 and comparable within the county, not across states. For a property ## What a county range means for _one address_ Hazard-zone scores are high in many places we scored. The highest is 94.5 in Twain Harte, the middle is 73.2, and the low end is 10.0 in unincorporated Tuolumne County. Fire-history scores also span a wide range: up to 95.0 near Jamestown, with a middle value of 70.0 and a low of 5.0 in unincorporated Tuolumne County. In the USFS Wildfire Risk to Communities product, mean annual burn probability is 1.01%, and the 90th-percentile cell burn probability is 2.81%. That same USFS product indicates 97.4% of the county can burn, and lists a mean conditional flame length of 6.21 feet. Across 156 sampled points in Tuolumne County, the score runs from 37.1 to 83.6 — two neighbouring parcels can sit in different tiers. A county number is the middle of that spread; it says nothing about which end yours is at. Find out where your Tuolumne County parcel sits Slope, the fuel touching the structure, the road out, the fire history within a mile — measured at your address, not averaged across the county. Free to request · PDF report with a 0–100 score, the drivers behind it, and a mitigation plan Coverage ## ZIP codes we cover in Tuolumne County Every one of the 27 ZIP areas that touch Tuolumne County — we run address-level reports in all of them. They are grouped by the median score of the points we sampled inside each, which is a neighbourhood-scale indicator and **not** a score for any property: two homes in the same ZIP routinely land in different tiers. **Very High** 2 ZIPs - [95375 Twain Harte80](/wildfire-risk/zip/95375/) - [95305 Groveland76](/wildfire-risk/zip/95305/) **High** 10 ZIPs - [95335 Twain Harte75](/wildfire-risk/zip/95335/) - [95310 Columbia69](/wildfire-risk/zip/95310/) - [95321 69](/wildfire-risk/zip/95321/) - [95383 Twain Harte68](/wildfire-risk/zip/95383/) - [95379 Tuolumne66](/wildfire-risk/zip/95379/) - [95370 Sonora66](/wildfire-risk/zip/95370/) - [95329 Groveland65](/wildfire-risk/zip/95329/) - [95364 60](/wildfire-risk/zip/95364/) - [95327 Jamestown58](/wildfire-risk/zip/95327/) - [95346 Twain Harte56](/wildfire-risk/zip/95346/) **Moderate** 1 ZIP - [95389 49](/wildfire-risk/zip/95389/) **No sampled point inside** 14 ZIPs [93517](/wildfire-risk/zip/93517/) · [93529](/wildfire-risk/zip/93529/) · [93541](/wildfire-risk/zip/93541/) · [95222 Columbia](/wildfire-risk/zip/95222/) · [95223](/wildfire-risk/zip/95223/) · [95224 Twain Harte](/wildfire-risk/zip/95224/) · [95228 Jamestown](/wildfire-risk/zip/95228/) · [95247 Columbia](/wildfire-risk/zip/95247/) · [95251 Columbia](/wildfire-risk/zip/95251/) · [95309 Jamestown](/wildfire-risk/zip/95309/) · [95311 Groveland](/wildfire-risk/zip/95311/) · [95361 Jamestown](/wildfire-risk/zip/95361/) · [95372 Tuolumne](/wildfire-risk/zip/95372/) · [95386 Jamestown](/wildfire-risk/zip/95386/) Grouped from 13 of 27 ZIP areas — the rest had no sample point fall inside them. The community shown is the nearest mapped place to the ZIP's centre. ZIP areas are Census 2020 ZIP Code Tabulation Areas intersecting the county boundary. Where to go next ## Tuolumne County wildfire risk _in context_ [California wildfire risk The statewide picture and every county page we publish](/wildfire-risk/california/) [Wildfire risk by state Every state and county we cover](/wildfire-risk/) [How Satelife calculates wildfire risk Data sources, layers, score composition, honest limits](/wildfire-risk/methodology/) [Create a wildfire evacuation plan Zones, egress routes, refuge areas](/wildfire-evacuation-plan/) [Run a report for a Tuolumne County address PDF + score + mitigation plan](/#cta) FAQ ## Frequently asked questions about _Tuolumne County wildfire risk_ What risk tier is most common in Tuolumne County? High is the most common tier in the scored locations, with 110 points. Very High has 31 points, and Moderate has 15. What are the largest and most recent large fires listed for this county? The largest listed fire is Rim (2013). The most recent large fire listed is 6-5 (2025). Is fire weather included in these county scores? No. Fire weather was not measured at all for this county in the places we scored. The page does include other wildfire-risk factors such as terrain, vegetation and fuels, hazard-zone, and fire-history scores. What does FEMA say about county-wide wildfire risk? FEMA’s National Risk Index rates Tuolumne County’s wildfire risk as Relatively High, and its wildfire expected annual loss as Relatively High. How much of Tuolumne County has burned since 1984? 46.3% of the county has burned since 1984, totaling 670,897 acres. This page is generated from a Tuolumne County data pack assembled on 2026-08-18 (pack v1.0). Scores are sampled across the county, not measured at any individual address, and are informational decision support — not a substitute for official evacuation orders, a fire-agency hazard determination, or an insurer's underwriting judgement. Data versions: fema\_nri 1.20.0 (Dec 2025) · landfire per adapter · nifc\_history All Years View · wfigs current · wrc v2.0 (2024) · zcta Census 2020. ## What does _your parcel_ look like, layer by layer? A county range shows the spread. An address-level Satelife report shows where in that spread your property actually sits — PDF, per-layer score, and a prioritized mitigation plan. [Start with your address →](/#cta) [![PRR](/images/prr.png)](/ficha-de-website-voucher-satelife.pdf) © 2024–2026 Satelife, Lda. All rights reserved. Satelife reports are for informational purposes only and do not constitute insurance, financial, or legal advice.