The John Glenn Astronomy Park might be the best free attraction in the Hocking Hills region that most visitors don't know about. Located within Hocking Hills State Park at 20531 State Route 664, JGAP offers something increasingly rare in Ohio: dark skies and the infrastructure to enjoy them. Named for Ohio native and space pioneer John Glenn, the park was established by the Friends of the Hocking Hills State Park to share the wonders of the night sky with the public.
What JGAP Offers
The park is open 24 hours a day, 7 days a week for self-directed stargazing. You don't need a telescope, a reservation, or any astronomy knowledge. The observation plaza provides an open field with unobstructed sky views, and on clear nights the unaided eye can see thousands of stars, the Milky Way, and passing satellites.
Guided stargazing programs run on clear Friday and Saturday nights from March through November, beginning 30 minutes after sunset. These programs include laser-guided constellation tours led by volunteer astronomers, telescope viewing of planets, star clusters, nebulae, and other deep-sky objects, and informal Q&A with knowledgeable volunteers. The programs are free.
During special events, JGAP brings out additional telescopes. Solar viewing programs during daytime hours allow visitors to safely observe sunspots and solar features through specially filtered telescopes. The park hosts concerts and collaborative events — including a September 26, 2026 concert with the Hocking Valley Community Orchestra, followed by telescope viewing of the rising Harvest Moon and Saturn.
The Dark-Sky Advantage
The Hocking Hills region, in rural southeastern Ohio, is one of the few areas left in the state where the night sky can be seen in its near-pristine state. JGAP was sited specifically for its darkness — low population density, minimal nearby development, and terrain that shields the observation field from distant light sources.
This matters more than most visitors realize. In metropolitan Columbus (about 60 miles northwest), light pollution limits naked-eye star visibility to a few hundred stars. At JGAP, under good conditions, you can see several thousand — plus the diffuse glow of the Milky Way stretching across the sky. The difference is dramatic and, for many first-time visitors, genuinely surprising.
Parking and Logistics
Parking passes are required for Friday and Saturday night programs and must be reserved in advance through JGAP's registration site. Programs regularly reach capacity — space may be infinite, but the parking area is not. Passes are released in waves, with additional passes sometimes added by Wednesday of program week. If you can't get a pass, the parking area generally clears somewhat about two hours after the program start time.
Visitors staying at the Hocking Hills Lodge or Hocking Hills State Park Cabins (immediately alongside JGAP) can walk over — a path runs between cabins 8 and 9. Due to dangerous nighttime conditions in the park, visitors from other park areas should not walk over; drive in.
Dark-Site Etiquette
JGAP is a dark site by design, and maintaining darkness is essential for everyone's experience. When arriving after dark, dim your headlights approaching the site and turn them off immediately upon parking. Do not use white-light flashlights or bright phone screens on the observation field. Red-light headlamps and phone red-light modes are acceptable. These aren't courtesies — they're requirements. A single burst of white light can reset 20–30 minutes of dark adaptation for every observer on the field.
November: The Peak Month
November 2026 offers exceptional conditions at JGAP. The Taurid meteor shower peaks in early to mid-November, producing slow, bright fireballs against a backdrop of increasingly dark autumn skies. The new moon on November 9 creates near-ideal conditions for the Northern Taurid peak (November 9–12). The programs run through November, and fall programs benefit from earlier sunset times — you don't have to stay up until midnight to see a dark sky.
The November 7–8 weekend combines JGAP programs with the Hocking Valley Scenic Railway's steam specials running that same weekend from nearby Nelsonville — a rare opportunity to pair two of the region's most distinctive experiences.
What to bring: A lawn chair or blanket for comfortable sky viewing, warm layers (it gets cold fast after sunset in November), binoculars if you have them (they widen your field of view for meteor watching), and a red-light headlamp for navigating the field. Leave the white flashlight in the car.
