Coverage analysis
What 15 minutes covers in Denver.
Denver's grid is unusually forgiving for drive-time modeling — until you hit the foothills west of I-25, where isochrones collapse against the Front Range and reachable area falls off a cliff. The metro's spoke-and-wheel highway system (I-25, I-70, C-470, E-470) produces dramatically asymmetric trade areas.
At 15 minutes, the Denver isochrone captures the standard trade area — a zone where trips are planned but customers are willing to cross neighborhood boundaries. Unlike a 30–80 km² in typical US metros; the range varies 3× depending on road density and barriers circle, the real road-network polygon follows Denver's actual highway corridors, accounts for bridge and interchange chokepoints, and respects the natural and built barriers that force drivers to detour.
Best-fit categories at 15 minutes: Casual dining, specialty retail, auto service, full-service salon, pet supply. The 15-minute isochrone is the standard input for franchise disclosure documents and protected-territory negotiations.
The city-level population of 716,577 and a median household income of $78,177 give a sense of Denver's economic density, but the figure that matters for site selection is the population inside the polygon — not the city as a whole. That number shifts dramatically depending on whether you're drawing from a high-density urban core or a lower-density suburban corridor. Use the tool above to set your actual candidate location, then generate the isochrone to see the real catchment.