Thomas Guide:1269: B-6
Marston Canyon is a little-known finger of Balboa Park that offers a lovely trail through towering eucalyptus, olive and pepper trees. Bounded on the east by Richmond Avenue and the west by I-163, the canyon is a tiny but vibrant hidden gem quietly sheltering migrating warblers, such as Nashville, Black-throated Gray, Hermit, Yellow, and Wilson’s; Black-headed Grosbeak, Western Tanagers, Bullock’s and Hooded Orioles, Thrushes, Pacific Slope and Ash-throated Flycatchers, hummingbirds, hawks, and sparrows. Multiple trails lead into at least three canyon arms. No facilities.