"I love to sketch urban environments, especially when natural and manmade elements collide. It is in these spaces that cities express their vitality and unique personality. I do a lot of sketching in cafes and bars as well as on the street or, in inclement weather, from my car. Whether in my hometown of Berkeley or throughout the greater Bay Area I find endless sketching inspiration.
My favorite pages are captured when unexpected opportunities arise so I keep my little sketching kit close at hand. Sketching also gives me the motivation to travel, alone or with others. It provides a purpose for my trips and outings; rather than feeling indulgent I become a noble explorer. I love that sketching is a solitary activity yet can place and ground me in the middle of crowded, lively scenes. My sketchbook is a true friend: it goes with me everywhere, shares my adventures, saves me from boredom, and keeps me company."
• Martha's blog: Trumpetvine Travels.
• Martha's art on Flickr.