The 24-mile Arkansas River Trail in Little Rock and North Little Rock is about half complete. The Headwaters Partnership gave a progress report Monday, saying that twelve and one-half miles are still to come of the $18 million dollar paved trail. On the south side of the river, the trail will eventually stretch from Pinnacle Mountain State Park west of Little Rock, through the city to the Clinton Library east of downtown. The trail will move across the river through North Little Rock and back out west to Cooks Landing, near the Interstate 430 bridge. The project has been driven by Headwaters, a cooperative of 27 organizations that promote health, fitness, parks and tourism in Arkansas. The trail is complete from east of Two Rivers park to the east edge of Rebsamen Park in Little Rock. Aside from bridges, the trail is finished on North Little Rock`s side. The Army Corps of Engineers plans to build a pedestrian bridge across the river from Rebsamen Park to Cooks Landing. Little Rock`s downtown section of the trail should be finished by 2005.