Mammoth, WY truck route planning & crash data
Plan safer truck routes in Mammoth: commercial truck and garbage truck crashes in Mammoth and Park County, dangerous roads, seasonality and route safety data for fleets. Patterns use Park County numbers.
Where fatal truck crashes happened
Risk scorecard
Key findings
Snapshot
Crashes by month
Garbage trucks vs all trucks
1 of 94 truck crashes since 2015.
Deadliest roads
No fatal large-truck crashes with a road name recorded here since 2015.
How Park County compares with Wyoming
Park County against Wyoming and the US, 2015–2025 (years with complete crash reporting). Per-resident rates make big and small places comparable.
Where Park County stands out
Full comparison
| Measure (2015–2025) | Park County | Wyoming | United States | vs state |
|---|---|---|---|---|
| Crashes per 100k residents / yr | 26.9 | 187.2 | 49.7 | 86% below the state |
| Deaths per 100 crashes | 6.5 | 4.5 | 3.4 | 1.4× the state |
| Injuries per crash | 0.43 | 0.43 | 0.49 | same |
| Garbage-truck share | 1.1% | 0.4% | 2.3% | 2.7× the state |
| On snow, slush or ice | 20.6% | 45.1% | 6.2% | 54% below the state |
| Morning rush (6–10 am) | 25.0% | 23.4% | 23.7% | same |
| In rain, sleet or snow | 12.0% | 25.0% | 13.8% | 52% below the state |
| Winter months (Nov–Mar) | 48.9% | 59.3% | 41.9% | 18% below the state |
| After dark | 20.6% | 32.8% | 24.8% | 37% below the state |
Compared with Wyoming, Park County is lower on crashes per 100k residents / yr, on snow, slush or ice and in rain, sleet or snow. It stands out for higher deaths per 100 crashes and garbage-truck share.
What stands out in Park County: 1 in 92 crashes involve a garbage truck (1 since 2015), vs 0.4% across Wyoming.
Overview
Park County has recorded 94 truck crashes since 2015, with 40 people injured and 6 killed.
Across the years with complete reporting, that is roughly one truck crash every 44 days.
Only 0 truck crashes were reported in Mammoth since 2015; patterns below come from Park County as a whole.
When crashes happen
February has the most truck crashes, 13.8% of the yearly total, while May has the fewest (2.1%).
The five winter months (November to March) hold 48.9% of truck crashes, against 59.3% across Wyoming.
By time of day, 11 am–12 pm stands out with 11.7% of truck crashes.
Snow, slush or ice was on the road in 20.6% of truck crashes, compared with 45.1% in Wyoming.
Where crashes happen
NHTSA lists no located fatal large-truck crashes within 10 miles of Mammoth since 2015.
Garbage & waste trucks
Garbage and refuse trucks were involved in 1 crash, 1.1% of the total, against 0.4% across Wyoming.
Route planning tips for Mammoth fleets
- Build extra time into February routes: it has the most truck crashes here.
- Use the free Route Planner to score your route and spot low bridges before drivers head out.
About the data
Sources: the FMCSA crash file for all reported truck crashes and NHTSA FARS for fatal crashes with a large truck. Every statement here comes straight from those numbers.
Truck crashes by year: all trucks vs garbage trucks
Seasonality: when trucks crash in Park County
By hour of day
Most dangerous roads for trucks
No fatal crashes involving a large truck with a road name were recorded within 10 miles since 2015.
Roads named most in all truck crash reports
| Road | Truck crashes since 2015 (Park County) |
|---|---|
| Us 14A/Wy 114 | 3 |
| 17Th St/Us 14/Us 16/Us 20/Wy 12 | 2 |
| Frannie Port Of Entry | 2 |
| Us 14A/Wy 114/Coulter Ave | 2 |
| 16Th St & Sheridan Ave | 1 |
| 17Th St/Us 14/Us 16/Us/20/Wy 12 Mp 52.54 | 1 |
| Appaloosa Lane | 1 |
| Beck Ave & 16Th St | 1 |
Mammoth at a glance
| Land area | 0.8 sq mi |
| Median household income (ZIP 82190) | $64,674 |
Waste facilities and haulers nearby
Historical data: truck crashes in Park 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 | 5 | — | 0.4 |
| 2000s | 5 | +3% | 0.1 |
| 2010s | 8 | +51% | 0.1 |
| 2020s | 9 | +8% | 0.8 |
From the 1990s to the 2020s, yearly reported truck crashes went from 5 to 9. Some of the change may reflect how crashes were reported. Fatal crashes involving a large truck averaged 0.2 a year in 2016–19 and 0.8 a year in 2020–24.
Nearby places
Questions fleets ask about Mammoth
How many truck accidents are there in Mammoth?
Park County has had 94 reported truck crashes since 2015, injuring 40 people and killing 6.
When do most truck crashes happen in Mammoth?
February has the most truck crashes in Park County, 13.8% of the yearly total.
How many garbage truck accidents happen in Mammoth?
Since 2015, Park County has reported 1 garbage-truck crash, or 1.1% of its truck crashes.
How do truck crashes in Mammoth compare with Wyoming?
Park County records 26.9 truck crashes per 100,000 residents a year, against 187.2 across Wyoming.
How do I plan a garbage truck route in Mammoth?
The free Route Planner takes your stops and returns a route risk score, safer alternatives and low-bridge warnings.
2026 is a partial year. Updated October 2026.