[1] Nearly all of the town is drained by Beaver Brook, which flows south to the Merrimack River in Lowell, Massachusetts.

Small sections of town along its eastern border are drained by other minor tributaries of the Merrimack.

The highest point in Pelham is Jeremy Hill, at 577 feet (176 m) above sea level near the town's western border.

The earliest census data shows the town of Pelham having a population of 543 residents in 1767.

The U.S. Route 3 freeway that runs through Nashua is 8 miles (13 km) west of the center of Pelham, and Interstate 495 in Massachusetts is accessible 9 miles (14 km) south of Pelham, on the south side of Lowell, and 10 miles (16 km) east of Pelham, on the east side of Methuen.

The nearest rail service is the Lowell Line of the MBTA Commuter Rail which can be accessed at the Charles A. Gallagher Transit Terminal in Lowell or at the McGovern Transportation Center in Lawrence.

Most of the trails lead to the park's two ponds, local roads and houses or to Beaver Brook, a small river.

The town of Pelham completed an 18-hole disc golf course here, stretching over a quarter-mile, in September 2007.

Many players from surrounding towns enjoy a round of disc golf set in the woods adjacent to the sport fields.