90 - Parallel Highway 78. 32 miles, 1928 ft el, 62 ft/mi

0.0 S Coast Hwy 101
 0.1 E Grand
 0.5 L Jefferson
 1.7 R Marron
 2.8 R Avenida de Anita
 3.4 L Carlsbad Village
 5.3 L College
 6.1 R Lake
 6.4 L Thunder
 6.7 R Hacienda
 9.8 R Vale View (2nd one)
10.0 L Crest View
10.2 R Sunset
11.0 L Buena Vista
11.3 L Mar Vista
12.4 R Thibodio
13.9 = Plumosa
14.2 R Plumosa
14.7 L Oleander
15.7 R Las Flores
15.8 L Descanso
16.2 R Pawnee
16.4 L Grand
16.9 R Via Vera Cruz
17.7 R Discovery
18.4 R Discovery
18.5 L San Pablo
18.7 L San Pablo
20.3 L San Marino
20.7 R Lake San Marcos
21.0 R Rancho Santa Fe
21.4 L San Marcos
22.7 = Palomar Airport
27.5 R Hidden Valley
28.0 L Lego bike path
28.5 R Lego
28.9 L Cannon
30.1 R Coast Hwy 101
32.3 return to start