Black Rock Mill – John Poole House loop from Planetary Radio Emissions Discovery Site

If you're looking for a touring cycling route that blends history, science, and scenic rural Maryland, the Black Rock Mill – John Poole House loop from Planetary Radio Emissions Discovery Site is a challenging option. This difficult 33.3 miles (53.6 km) route packs in 1514 feet (461 metres) of elevation gain, taking roughly 3 hours and 17 minutes to complete, making it ideal for experienced riders seeking a rewarding day out.

What to expect on Black Rock Mill – John Poole House loop from Planetary Radio Emissions Discovery Site

Expect a varied journey as you pedal through the Montgomery County Agricultural Reserve, where picturesque farms and orchards give way to the historic John Poole House, the oldest building in Poolesville. The route continues to Black Rock Mill in Seneca Creek State Park, offering natural beauty along Great Seneca Creek, before heading towards the scientifically significant Planetary Radio Emissions Discovery Site. The terrain features moderately hilly sections, providing a good workout for touring cyclists who appreciate a mix of paved and potentially rustic roads.

Planning your visit

Given the route's mix of paved and potentially rustic roads, it's wise to check local road conditions before you head out. While specific parking details aren't provided, you'll likely find access points near the start of the loop. This route is best enjoyed by cyclists with good fitness who are comfortable with elevation changes and varied road surfaces.

Trail details

• Distance: 33.3 miles (53.6 km)
• Elevation gain: 1514 feet (461 metres)
• Difficulty: difficult
• Estimated time: 3 hours and 17 minutes