Connector trails do just that – connect. These are usually short, not always good to ride, but can shorten the distance on a ride.
Allen Road – Mission Hills
Allen Road leaves Ft Stockton Dr near Hickory St. It looks like a driveway, but goes to a trail that gradually leads down to Mission Valley. Parts of the trail are nice singletrack, others require some carrying. There is an old bridge about 2/3 down from the top, so at some point, this trail was traverseable road. At the bottom, the trail leads into the parking lot for the Ramada Inn along Hotel Circle South. This trail is best ridden down, as it is rather steep overall.
Two trails, both along I-805, can be used to bypass portions of the neighborhoods west of the freeway in the Clairemont area. The northern trail runs from Arvinels Ave at the south end of the MacDowell Neighborhood Park to Clairemont Mesa Blvd. The second path starts on Cannington Dr between Liebel Ct and Hannon Ct to Balboa Ave.
Home Avenue/ 39th St Connector
This very short trail makes travel south of SR-94 possible from Home Avenue. It runs from Home Avenue at SR-94 to Broadway at 39th St. Additional connections can be had at C St. Watch for debris, as this tends to be a dumping spot. This trail is best used for travel from Fairmount Park / southern City Heights to the Golden Hill / Downtown area.
Kelton Road / Federal Blvd Connector
The State Route 94 Freeway breaks up Federal Blvd between San Diego and Lemon Grove. This paved trail connects the two along the south side of the freeway between Kelton Road and eastern Federal Blvd. The trail is unlit and is only lightly maintained. Use caution during rains and at night.
Juniper Canyon Open Space – South Park
There are two major branches to this canyon and I’ve only ridden the east branch so far. This connects Delevan Dr (near SR-94/SR-15) and Boundary St. It follows a streambed, with two crossings, both of which may require carrying. The trail is mostly singletrack. It isn’t terribly useful as a connection unless you are on a very local ride. But still, riding dirt in the city is rare, so it is still nice to have. The other, west branch, connects the north end of Whaley Ave to Juniper St. The upper part is fairly open, the lower a bit more overgrown. I haven’t ridden, so I don’t know the condition of the trail.
Mission Hills Open Space
This open space canyon goes from the 1800 block of Titus St up to Washington Pl at Mission Hills Park. This is a fairly decent singletrack trail, with some sections in the lower half washed out. Not much to it, but it does make for some off road riding in the city.
Sorrento Valley – UTC Trail
Sorrento Valley is a tough place to get to by bicycle. Travel from the south tends to involve a freeway shoulder (I-5), a long detour to the east via Carroll Canyon, or a long detour to the west via Torrey Pines. For those with a bike that can handle it, there is another way. Running from the southeast end of Roselle St to Eastgate Mall between Easter Way and Genesee Ave. The trail is usually in good condition, with one stream crossing that can get real muddy about 1/3 from the bottom. As this is a dirt access road for the City, through City owned land, access is not an issue. Some plans do call for this to become an official trail, possibly paved.
State Route 52 Bike Path
While not entirely within the City of San Diego, it does serve as decent connector. The path is bi-directional and runs along the north side of the State 52 Freeway from Santo Road in San Diego to Mast Blvd in Santee. There are no intermediate intersections, so keep this in mind when you travel this path. It is separated from the freeway with a concrete barrier. As it goes over Mission Trails Summit (821′), there is a bit of a grade on both sides.