Question: How long is the bicycle trail that is near the Melbourne Zoo?

Context paragraphs:
Hart-Montague Trail State Park: William Field Memorial Hart-Montague Trail State Park, previously and more commonly known as Hart-Montague Trail State Park, is a linear state park in Michigan that consists of a bicycle trail running from the city of Montague in Muskegon County to the city of Hart in Oceana County.  Recognizing its potential, Bill Field of Shelby purchased the former railroad and donated it for trail use to the State of Michigan.  Opened in 1991 and officially adopted as a Rails to Trails park in 1996, it was one of the first "Rails to Trails" projects in the State of Michigan.  Its success paved the way for more trails throughout the state and Midwest.  The trail's total length was previously 22 mi ; however continuous expansions have increased that length in recent years with the hope of linking it to other trails throughout Western Michigan.  A number of local businesses, such as restaurants and ice cream parlors, in the towns along the trail have posted small, discreet signage near the trail to attract cycling visitors who might not otherwise ever notice the little shops in the intervening small municipalities.  A whimsically themed ice cream/dairy bar in New Era, roughly halfway along the trail, is often mentioned by trail visitors, although there are also a number of others spread along the trail.  There is a bicycle rental shop on Thompson St in Montague in the south, a repair shop right off the trail in Mears as well as another rental shop on Silver Lake Rd in Mears several miles away from the northern section of the trail.

Mesabi Trail: The Mesabi Trail is a 132-mile paved bicycle trail running from Grand Rapids, Minnesota to Ely, Minnesota.  As of 2016, the trail is still under construction with approximately 25 miles of trail incomplete.  The trail goes through the many small towns along it, such as Marble, Keewatin, Hibbing, Mountain Iron, Virginia, and Gilbert.  Much of the trail runs along abandoned railroad grade.

Werribee Open Range Zoo: Werribee Open Range Zoo is an African themed zoo in Werribee, about 32 km south-west of Melbourne, Victoria, Australia.  It is part of the Zoological Parks and Gardens Board or 'Zoos Victoria' which also includes Melbourne Zoo and Healesville Sanctuary.  It is situated on approximately 225 ha and is located on the Werribee River in Werribee Park, adjacent to the Werribee Mansion.  It was originally agistment land to the Melbourne Zoo.

Adelaide Zoo: Adelaide Zoo is Australia's second oldest zoo (after Melbourne Zoo), and like other leading zoos in Australia, including Melbourne Zoo, Taronga Zoo, and Perth Zoo it is operated on a non-profit basis.  It is located in the parklands just north of the city centre of Adelaide, South Australia.  It is administered by the Royal Zoological Society of South Australia Incorporated (trading as Zoos SA) which is a full institutional member of the Zoo and Aquarium Association (ZAA) and the World Association of Zoos and Aquariums (WAZA).  and which also administers the Monarto Zoo near Murray Bridge.

Coast-to-Coast Connector trail: The Coast-to-Coast Connector bicycle trail is a proposed 250 mile bicycle and multi-use trail across Florida.  The trail would provide a path connecting the Gulf of Mexico on peninsular Florida's west coast to the Atlantic Ocean on Florida's east coast.  Legislation in support of the planned trail passed the Florida House of Representatives in April 2014 and would fund it with $15.5 million.  Florida State Senator Andy Gardiner of Orlando is one of the plan's leading supporters.  Legislation funding the trail with $50 million was vetoed in 2013 by Governor Rick Scott in 2013.  The funding would be used close gaps in the trail route.  The estimated cost of the project is $45 million.  It would incorporate existing public spaces and trails including:

Lady Carrington Drive: Lady Carrington Drive is a designated scenic bicycle trail located in the Royal National Park that runs from Audley to the southern precinct of the park east of Waterfall, alongside the Hacking River.  Opened in 1886, the 10-kilometer long trail was the first scenic route to be completed in the Royal National Park, seven years after the park was officially declared.  It initially served as a carriageway, although traffic on the road is closed, and the trail now serves as a bike and walking trail.  The route bypasses many scenic points along the Hacking River, including Gibraltar Rock and Palona Cave.

Capital City Trail: The Capital City Trail is a shared use path for cyclists and pedestrians, which circles the Melbourne city centre and some inner eastern and northern suburbs of Melbourne, Victoria, Australia.  It is 29km in length, and mostly consists of sections of other trails, such as the Merri Creek Trail, Main Yarra Trail, Moonee Ponds Creek Trail and Inner Circle Rail Trail.

Melbourne Zoo: The Royal Melbourne Zoological Gardens, commonly known as the Melbourne Zoo, contains more than 320 animal species from Australia and around the world.  The zoo is 4 km north of the centre of Melbourne.  It is accessible via Royal Park station on the Upfield railway line, and is also accessible via tram routes 58 and 19, as well as by bicycle on the Capital City Trail.  Bicycles are not allowed inside the zoo itself.

Western Express Bicycle Route: The Western Express Bicycle Route is a 1579 mile (2541 km) bicycle touring route that connects San Francisco, California, to the TransAmerica Bicycle Trail in Pueblo, Colorado, traveling through California, Nevada, Utah, and Colorado.  The route is mapped by the Adventure Cycling Association.  Combining the Western Express Route with the TransAmerica Trail forms a 3762 mile (6054 km) transcontinental bicycle route through nine U.S. states from San Francisco, California, to Yorktown, Virginia.

Kenilworth Trail: The Kenilworth Trail is a paved bicycle trail in Minneapolis, Minnesota.  It runs nearly 1.5 mi and acts as a connector between the Cedar Lake Trail in the north and the Midtown Greenway in the south.  Like the Cedar Lake Trail, most of the route is composed of a triple-divided cycleway/pedway with a pair of one-way paths for bicycles and another path for pedestrians.  According to the Minneapolis Bicyclist & Pedestrian Count Report from 2013, 2100 bicyclists and 410 pedestrians are estimated to use the trail daily.  On some maps, a southern segment of the Kenilworth Trail is called the Burnham Trail.

Supporting paragraphs: Melbourne Zoo Capital City Trail
Answer: 29km