How far is Boulder from the ocean?
Boulder is a long way from the sea: the nearest coastline is 750 miles (1,207 km) away in a straight line. The nearest stretch of coast is in Sonora, Mexico.
To the coast
750 miles
1,207 km · straight line
Nearest land border
572 miles
with Mexico
Setting
Far inland
23rd farthest from the ocean of 861 cities
BoulderNearest point on the coast
How far are you from the ocean?
Measure from where you are standing. On a phone this uses GPS, so the answer is for your exact spot, not the city centre.
Boulder at a glance
- Coordinates
- 40.0150° N, 105.2706° W
- Region
- Colorado, United States
- Distance to the coast
- 750 miles (1,207 km), in a straight line
- Nearest point on the coast
- 31.2136° N, 113.1171° W (Sonora, Mexico)
- Nearest land border
- 572 miles (920 km), with Mexico
- Among United States's cities
- 10th farthest from the ocean of the 300 cities measured
Nearby cities and the coast
Explore United States
Questions
How far is Boulder from the ocean?
Boulder is a long way from the sea: the nearest coastline is 750 miles (1,207 km) away in a straight line. The nearest stretch of coast is in Sonora, Mexico.
Is that the driving distance?
No. 750 miles (1,207 km) is the straight-line distance from the city centre to the nearest point on the shore. The drive to a beach is longer, often much longer, and depends on the roads.
How far is Boulder from the nearest border?
Boulder is 572 miles (920 km) from the nearest land border, with Mexico, in a straight line.
Where in Boulder is this measured from?
From the city's centre point (40.0150° N, 105.2706° W). A large city spreads out, so some neighbourhoods are closer to the ocean than this and some farther. For an exact figure from where you are, use your own location.
Measured by MapGO on October 19, 2026 with the same coastline data as the distance to coastline calculator. All distances are straight lines over the Earth's surface.