The Monon is open from 10th Street to 146th Street, and will ultimately reach another 9+ miles to Sheridan via Wesfield and Hamilton County, both of which tentatively plan to develop the trail in the future.  Much of the Monon is plowed in Boone and Clinton Counties, but north of Frankfort toward Delphi and Monticello, the corridor is in relatively good shape. There are trail groups in Frankfort, Delphi and Monticello interested in connecting these cities.

While not a planned trail, the Indy MPO and MCCOG in Madison County have designated this bike route as the Interurban Trail from the Fall Creek Trail to Mounds State Park in Anderson.  The existing Fall Creek Trail, part of the Indy Greenways network, would connect users from downtown Indy to the Interurban Trail at Fort Harrison.  Pendleton has a segment of multi-use trail open.  Unfortunately, an off-road paved trail is not planned to connect the sections in between.

This trail will become the eastern section of the proposed cross-state National Road Heritage Trail.  A combination of Indy Greenways will bring users from downtown to the Pennsy Trail Corridor, from Arlington Road to Greenfield and beyond.  Both Cumberland and Indianapolis are actively pursuing Pennsy Trail development; the rest of Hancock County is still a dotted line for now.  The city of Richmond and the Cardinal Greenway both lie along this corridor.  Just 20 miles to the east of Richmond and the Ohio state line lies the Wolf Creek Rail-Trail near Dayton, Ohio, which one can follow to the Ohio-to-Erie Trail and to Cleveland, Ohio along a string of continuous multi-use paths by about 2012.

The White River Trail is planned nearly to the Johnson County line.  The South White River Trail is under development from White River State Park to Raymond Street. A south spoke trail along Bluff Road, which runs east of the White River between I-465 and Greenwood, has also been proposed by Indy MPO.   The Greenwood Trails Network would connect populated suburbs via Emerson Avenue in northern Johnson County.

This corridor is anticipated to form the western half of the proposed cross-state National Road Heritage Trail.  Beginning near Indianapolis Int'l airport and ending at Terre Haute is the Vandalia Corridor, currently developed as a trail for 6 miles in Terre Haute, 4 miles in Greencastle, and 2 miles in Plainfield. The former Conrail line is largely intact and with enough support would make an excellent long-distance trail, connecting many small towns along the way which would benefit economically.  

The B&O Trail, though bearing slightly northwest, should serve as a solid greenway artery to connect communities west of Indy. The trail is currently in the land acquisition phase with opening estimated in 2008.  Indy Greenways is directing development in Marion County, while BOTA, the B&O's grass-roots support organization, is supporting development west of Marion County. The trail is anticipated to eventually extend into Putnam and Parke Counties to the Wabash River at Montezuma; however, support for trails is very thin west of Hendricks County and this section makes our Most Wanted / Least Protected corridor list.

This is the corridor which could materialize into a trail from Indy to Lafayette.  In Marion County, the Michigan Road Multi-use Trail project, as proposed by the Dept. of Metropolitan Development (DMD), would be a future trail connecting the existing Central Canal Towpath near 38th Street to neighborhoods along Michigan Road north to 86th Street, running parallel to Michigan Road.  From there it is merely 1 mile to the proposed southern end of the Zionsville Trail, which is open for 3.5 miles between Eagle Creek and Boone County Rd. 875E.  The Friends of Boone County Trails are supporting a trail from Zionsville to Lebanon and Thorntown.  The 28-mile stretch from Lebanon to Lafayette has been proposed as the Farm Heritage Trail.

One of the more promising inter-regional greenway routes which does not involve Marion County is a string of planned and proposed trails across Hamilton County, largely involving the undeveloped Central Indiana Railway Corridor from Noblesville to Westfield, dubbed the Midland Trace, as well as a chain of various other paths linking Cool Creek Park, downtown Carmel, Carmel's future Central Park, the Village of West Clay, and village of Zionsville.  The Midland corridor is on the trails master plan for Westfield, Noblesville, and Hamilton County and has a grass roots group supporting its development.  The group is working to open a 2.5-mile section of trail between Simon Moon Park in Westfield and Hazel Dell Elementary in Noblesville, which may spur further development.  The trail needs more support from Noblesville.

In 2003 planning began for a landmark trail encircling downtown Indianapolis, called the Cultural Trail.  Not only would this trail serve as a remarkable destination in itself, but also as a true hub in the hub-and-spoke layout of Central Indiana's emerging trail network. The trail would use widened, redesigned sidewalks to connect bicyclists and pedestrians to dozens of attractions and lead them toward existing and future outlying trails such as the Monon Trail and other spokes described here.