Hi,
You might want to take I15 south from 78 to Scrips Poway Road. There is a Costco there to, with a gas station, it will offer great low cost fuel if you need it. Then keep going east on this great 4 lane road to highway 67. Take this north to Ramona, and you will avoid a skinny 2 lane road that is highway 78 between San Diego Animal Park and Ramona. It becomes really steep, and skinny. I have taken my RV this way many times, but prefer Scripts Poway Road! I would take that way home if I was working in North San Diego County, and take scripts Poway road to highway 67, then south 5 miles to the ranch that I lived on for 4 years!
There are a couple of other cut-offs that can save a few more miles, but will take you up a 7% grade that is marked "No trucks over 40 feet" on the downhill side. You might not like that . . LOL It is Poway Road. By taking Camino De Norte, this turns into Twin Peaks Road, then turn right at the end of this road (great pizza place on that corner) and take this to the end, you will take that (Poway Road) to the left, up the 2 mile long 7% grade to highway 67, and then turn left to get to Ramona. This will save about 8 miles from taking interstate 15 south to Scripts Poway Road. (Scripts Poway road starts out at 6 lanes near the freeway, but goes to 4 lanes most of the drive, and is not all that steep, except one part just before reaching highway 67)
I would recommend either of these routes over taking highway 78 from Escondido to Ramona. AS you cross over I15, you leave the freeway, then drive on 4 lane and 2 lane city residential streets until you reach the old highway 78. It is the type of old highway that follows the creeks, and twists around trees, between property lines, and such. There is one steep section, with no turnouts.
Fred.
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