85 - Magee Park to Bonsall. 43 miles, 2624 ft el, 61 ft/mi

0.0 N Coast Hwy 101
 0.7 L Eaton
 0.8 R Broadway
 1.2 L Cassidy
 1.3 R Pacific
 3.8 R RR underpass trail
 3.9 L SLR trail
11.5 L Jackson
11.6 R Tyler
11.7 L SLR trail
12.6 L CA-76
15.4 L Old River
18.0 L Camino del Rey
18.4 R ARCO/McDonalds
18.5 U Refuel ARCO
18.7 R Old River
21.3 = E Vista
23.4 R Osborne
24.0 R Santa Fe
24.7 L Melrose
31.5 L Sycamore
32.0 R Business Park
33.2 R Palomar Airport
35.5 R El Camino
38.6 L Kelly
39.1 R Park
40.2 L Adams
41.0 L Cinquapin
41.3 R Jefferson
41.5 L Tamarack
42.0 R Coast Hwy 101
43.1 return to start

Not a great ride, but chosen by others.
I would avoid some arterials: Melrose, Palomar Airport, El Camino