Cycling Acadia’s Carriage Roads

Between 1913 and 1940, John D. Rockefeller Jr. funded and oversaw the construction of 45 miles of broken-stone carriage roads across Mount Desert Island. Rockefeller was an accomplished horseman who watched the automobile transform American roads and wanted to preserve at least one corner of MDI for non-motorized travel. He donated the entire network to Acadia National Park — with a specific condition attached: no motor vehicles, ever. That condition has held.

The result is the finest motor-free cycling network in the US National Park System. The carriage roads wind through mixed spruce and hardwood forest, skirt the shores of Eagle Lake and Jordan Pond, cross granite ridgelines with open views, and pass through some of the most carefully tended landscape on the East Coast. The broken-stone surface — essentially compacted crushed gravel — rolls well on appropriately-tired bikes and drains quickly after rain.

The network is punctuated by 17 hand-cut granite bridges, each individually designed, no two alike. Rockefeller oversaw the bridge designs personally and insisted on this variety. Finding them becomes a secondary objective on any carriage road ride — short detours to locate Duck Brook Bridge or Waterfall Bridge are well worth the extra distance.

Rockefeller hired noted landscape architects and stonemasons to design bridges that would complement the landscape rather than dominate it. Each bridge uses locally quarried pink and gray granite and is designed to suit its specific stream crossing — arched spans, low flat crossings, and multi-arch structures all appear across the network. Waterfall Bridge on Duck Brook is the most dramatic, with a double arch framing the falls. The Stanley Brook Bridge near Seal Harbor is the largest.

The bridges are identified by number on official NPS carriage road maps. A dedicated bridge-finder loop is a rewarding way to structure a longer ride — the full circuit hitting all 17 requires roughly 25 miles and several hours on the roads. For casual riders, even encountering three or four bridges in a half-day loop adds a distinctive dimension to a ride that has no equivalent anywhere else in the park system.

Two well-regarded shops operate near the Village Green in Bar Harbor, both within easy riding distance of the Eagle Lake connector that leads to the carriage road network.

The easiest access from Bar Harbor is the Eagle Lake connector, a 2-mile paved path that runs from the north end of town directly to the Eagle Lake carriage road trailhead. You can ride from your lodging or the rental shop to the carriage road network without loading a car or navigating park road traffic. It’s a genuinely elegant solution and it’s free.

Alternatively, the Island Explorer shuttle bus accommodates bikes on a first-come, first-served basis. The Eagle Lake stop and Jordan Pond stop are both served by the bus network, letting you stage a point-to-point ride rather than a loop. Buses run from late June through Columbus Day weekend and are fare-free.

Hybrid tires in the 35mm-or-wider range are ideal for the carriage road surface. The broken stone compacts well and is not technically demanding, but a narrow road slick will roll noticeably slower and with more vibration than a tire with some volume and tread. Mountain bike tires work fine but are overkill — the roads are smooth enough that the extra rolling resistance is unnecessary.

E-bikes are explicitly permitted on the carriage roads, a deliberate NPS policy that reflects the motor-free intent of the network — electric-assist pedal bikes are not classified as motor vehicles. They make longer loops accessible to a wider range of riders and are a practical option for families with mixed fitness levels. Both rental shops in Bar Harbor carry e-bikes.