I'll assume "ca" refers to California rather than Canada. Maryland is about 200 miles across which leaves a lot of possible halfway points. I'm not sure that matters. The bulk of them will be in the center of the country, in places like Yukon, Oklahoma, which is about as far from any coastal beaches as it is possible to get.
Stuart, CA.
Encino, CA
Cherokee Mobile Gardens, California.
Whitehall, Montana, between Bozeman and Butte.
Rochester, CA is a halfway point between LA and Victorville.
The halfway point between Kingman, AZ and Sacramento, CA falls in or around Keene, CA.
halfway points
The halfway points are the points which mark the half distance covered by the flight. These lie in the mid of both the above mentioned places. These points change for different locations. Halfway points for the above mentioned places are Richmond or Berkeley CA.
Del Mar or Solana Beach look pretty good...
It is 2,707.41 miles according to MapQuest.
A coastal point halfway between Portland, OR, and Huntington Beach, CA, is likely around the northern part of California's coastline, near towns like Eureka or Arcata. This area is situated along the picturesque Northern California coast, offering scenic views and natural beauty. While not exactly halfway in terms of distance, it serves as a convenient coastal reference point between the two cities.
Assuming you take U.S. Higway 101, Greenfield, CA is halfway between Paso Robles, CA and Hollister CA?