ZIP 59635 (East Helena, MT) truck route planning & crash data
Plan safer truck routes around ZIP 59635: commercial truck and garbage truck crashes here and in Lewis and Clark County, dangerous roads, seasonality and route safety data for fleets.
Where fatal truck crashes happened
Risk scorecard
Key findings
Snapshot
Crashes by month
Garbage trucks vs all trucks
2 of 228 truck crashes since 2015.
Deadliest roads
How Lewis and Clark County compares with Montana
Lewis and Clark County against Montana and the US, 2015–2025 (years with complete crash reporting). Per-resident rates make big and small places comparable.
Where Lewis and Clark County stands out
Full comparison
| Measure (2015–2025) | Lewis and Clark County | Montana | United States | vs state |
|---|---|---|---|---|
| Crashes per 100k residents / yr | 24.9 | 64.3 | 49.7 | 61% below the state |
| Deaths per 100 crashes | 5.3 | 3.8 | 3.4 | 1.4× the state |
| Injuries per crash | 0.29 | 0.34 | 0.49 | 15% below the state |
| Garbage-truck share | 1.0% | 0.9% | 2.3% | same |
| On snow, slush or ice | 34.5% | 39.4% | 6.2% | 12% below the state |
| Morning rush (6–10 am) | 20.9% | 22.9% | 23.7% | 9% below the state |
| In rain, sleet or snow | 24.3% | 20.6% | 13.8% | 1.2× the state |
| Winter months (Nov–Mar) | 45.6% | 54.3% | 41.9% | 16% below the state |
| After dark | 20.9% | 30.8% | 24.8% | 32% below the state |
Lewis and Clark County sits below Montana on crashes per 100k residents / yr, injuries per crash and on snow, slush or ice. It stands out for higher deaths per 100 crashes and in rain, sleet or snow.
The headline for ZIP 59635: US-12 5 fatal truck crashes since 2015, more than any other road within 10 miles of ZIP 59635.
Overview
Police reported 228 crashes involving commercial trucks in Lewis and Clark County since 2015: 69 people were injured and 12 were killed.
Across the years with complete reporting, that is roughly one truck crash every 19 days.
When crashes happen
The worst month is October with 13.2% of truck crashes; the quietest is May at 3.9%.
The five winter months (November to March) hold 45.6% of truck crashes, against 54.3% across Montana.
By time of day, 1–2 pm stands out with 9.6% of truck crashes.
34.5% of truck crashes here happened on snow, slush or ice, against 39.4% across Montana.
Where crashes happen
US-12 leads within 10 miles of ZIP 59635 with 5 fatal crashes involving a large truck since 2015. After it: Canyon Ferry Rd (1) and I-15 (1).
Garbage & waste trucks
2 crashes involved a garbage or refuse truck, a 0.9% share (Montana: 0.9%).
Route planning tips for ZIP 59635 fleets
- Plan October schedules with more margin; it is the worst month for truck crashes in Lewis and Clark County.
- Where you can, review stops along US-12; it has the most fatal large-truck crashes nearby.
- Use the free Route Planner to score your route and spot low bridges before drivers head out.
About the data
Crash counts come from the FMCSA crash file (police-reported crashes involving trucks over 10,000 lb); fatal-crash locations come from NHTSA FARS. Text on this page states only what these numbers show.
Truck crashes by year: all trucks vs garbage trucks
Seasonality: when trucks crash in Lewis and Clark County
By hour of day
Most dangerous roads for trucks
| Road | Fatal truck crashes since 2015 (within 10 miles) |
|---|---|
| US-12 | 5 |
| Canyon Ferry Rd | 1 |
| I-15 | 1 |
Roads named most in all truck crash reports
| Road | Truck crashes since 2015 (Lewis and Clark County) |
|---|---|
| Mm 221.5 I-15 | 4 |
| Mm 213.0 I-15 | 3 |
| Mm221.6 I-15 | 2 |
| Canyon Ferry Rd\Custer Ave | 1 |
| E Us Highway 12 And Lola St | 1 |
| Mm 108.2 Mt Highway 200 | 1 |
| Mm 213.1 I-15 | 1 |
| Mm 213.1 I15 | 1 |
ZIP 59635 at a glance
| Population | 8,292 |
| Density | 40 per sq mi |
| Median household income | $83,740 |
| Median home value | $386,349 |
| Home ownership | 83% |
Waste facilities and haulers nearby
Historical data: truck crashes in Lewis and Clark County since the 1990s
Combines the FMCSA crash file (all reported truck crashes, real coverage from about 1990) with NHTSA FARS (fatal crashes involving a large truck, 1982–2024).
| Decade | Truck crashes / yr | Change | Fatal crashes / yr (FARS) |
|---|---|---|---|
| 1990s | — | — | 0.5 |
| 2000s | 18 | — | 0.5 |
| 2010s | 18 | +1% | 0.5 |
| 2020s | 18 | +0% | 1.2 |
In the 2000s about 18 truck crashes a year were reported; in the 2020s, about 18. Reporting coverage also changed between these periods. Fatal large-truck crashes: 0.8 a year in 2016–19, 1.2 a year in 2020–24.
Nearby ZIP codes
Questions fleets ask about ZIP 59635
How many truck accidents are there in ZIP 59635?
Since 2015, 228 crashes involving commercial trucks were reported in Lewis and Clark County (69 injured, 12 killed).
What is the most dangerous road for trucks in ZIP 59635?
Since 2015, US-12 has had the most fatal large-truck crashes within 10 miles of ZIP 59635: 5.
When do most truck crashes happen in ZIP 59635?
The worst month is October: 13.2% of truck crashes in Lewis and Clark County happen then.
Are garbage truck crashes common in ZIP 59635?
Since 2015, Lewis and Clark County has reported 2 garbage-truck crashes, or 0.9% of its truck crashes.
How does ZIP 59635 compare with Montana for truck crashes?
The yearly rate is 24.9 truck crashes per 100,000 residents in Lewis and Clark County, vs 64.3 for Montana.
How can I plan a safer truck route in ZIP 59635?
Use the free Route Planner: enter your stops to get a risk score, safer alternatives and the low bridges on your route.
2026 is a partial year. Updated October 2026.