Sometimes, the best adventures are tucked away, waiting for those in the know. Blue Sky Ecological Reserve is one such place. I’ve hiked this trail countless times, and with each visit, it feels more like my own secret escape. I’m excited to share my insider tips to help you discover this hidden gem nestled close to San Diego.
Blue Sky Ecological Reserve Hike Review: Quick Facts

- Location: North of Lake Poway, in Poway, California.
- Hours: Daily, sunrise to sunset.
- Parking: Small, limited parking lot adjacent to the main trailhead.
- Trails: Over 6.5 miles of trails in the reserve. Difficulty ranges from easy (Green Valley Truck Trail) to moderately strenuous (side trails leading up into the hills).
- Facilities:
- Portable restrooms at the trailhead parking lot.
- Picnic tables near the creek.
- Rules and Reminders:
- Stay on designated trails to protect sensitive habitats.
- Dogs are allowed but must be kept on a leash at all times.
- Pack out all trash – leave no trace.
- No bikes or horses on trails.
- Potential Hazards:
- Rattlesnakes are present. Stay alert and keep a respectful distance.
- Poison oak is found along some trails. Learn to identify it to avoid an itchy experience.

Finding the Trailhead (and a Parking Spot!)
Blink and you might miss it! The Blue Sky parking lot is hidden just past some residential areas, so keep your eyes peeled. Pro tip: Weekends, especially late mornings, get busy. Aim for an early start to snag a spot.
If the lot’s full, you can sometimes find street parking nearby, just be mindful of neighborhood signs. Since this trail is easily overlooked, I’d recommend using a GPS or mapping app the first time to guide you directly to the lot. Some weekends, especially during wildflower season, the parking lot can fill up before 9 am!
Easing into the Valley
The trail starts with a gentle downward slope, perfect for warming up and taking in that classic California chaparral scenery. The wide, well-maintained gravel path winds through a valley for about a mile, offering plenty of shade from California live oaks and other native trees.

This stretch is a treat for the senses – the dappled sunlight, the rustle of wind through the leaves, and the sweet, almost spicy scent of sun-warmed chaparral.
Keep your ears open for the cheerful chatter of birds too! This area is also dog-friendly, and if you’re lucky, you might spot a smaller side trail – a great detour for exploring deeper into the valley (just a heads-up, no furry friends allowed on that offshoot!).

Wildlife Watch
This shaded valley is perfect for spotting all kinds of critters. I’ve seen everything from tiny lizards warming themselves on the path to hawks circling overhead. Keep an eye on fallen logs and rocks – those are favorite sunbathing spots for reptiles!
Butterflies flit all around, especially near those wildflower blooms. Last time I was here, there was a huge black swallowtail I tried (and failed!) to get a good photo of. It was just stunning against those vibrant purple lupine flowers.
Choose Your Adventure: Lakes and Vistas
About three-quarters of a mile in, you’ll hit a fork in the road. Veer south, and with a little bit of an uphill climb, you’ll connect with the trail to gorgeous Lake Poway (a great add-on option!). The Lake Poway trailhead has picnic areas, restrooms, and even fishing opportunities – perfect for a family outing.

But for the classic Blue Sky experience, hang a left (north) and start making your way towards Lake Ramona. The terrain gets a bit tougher here with a gradual but steady climb, and the shade starts to thin out. While it’s more exposed, trust me – the panoramic views of the valley and Lake Poway below are worth the extra sun.
The Dam Challenge and Beyond
As you near Lake Ramona, brace yourself for the final push – you’ll be literally hiking up the dam itself! It’s a steep but short climb, and at the top? Lake Ramona awaits, with stunning views that stretch out toward the east and north.
Did you know that Lake Ramona is actually a reservoir built way back in 1895? Hiking up that dam and imagining the work it took over a century ago gives the view a whole other dimension.
A Hike for Everyone (with a Few Safety Reminders)
The beauty of Blue Sky is that it has something for all levels. That first shady mile in and out is perfect for families with little ones, strollers, and anyone looking for an easy, scenic walk through nature. But don’t let the easy start fool you – those climbs get tougher, rewarding you with gorgeous views if you venture further. Spring and early summer bring an explosion of wildflowers – a photographer’s dream!
Word of caution: this is Southern California, so be prepared for the elements! Snakes, especially rattlesnakes, love to sunbathe on warm days, so stay aware. Keep an eye out for poison oak too – it’s easy to brush against on some of the narrower trails. And of course, on those exposed sections, pack sunscreen and plenty of water, especially during the hotter months.

Flora Focus
Spring brings the wildflowers, but there’s botanical beauty year-round. Look for the twisted branches of manzanita bushes, the prickly leaves of California holly, and in summer, the bright blooms of sagebrush. This makes a great hike to brush up on your plant identification skills!
A True Gem
Whether you’ve got an hour to explore or an entire day for a challenging climb, Blue Sky Ecological Reserve delivers. It’s a testament to nature’s resilience that this area, hit hard by fires years ago, is now such a thriving ecosystem. Come discover this hidden jewel in the heart of Poway – it just might become your secret escape too.

Beyond the Hike: Blue Sky connects to other trail systems, including the challenging climb to iconic Potato Chip Rock. That’s an adventure for another day, but it’s cool to know the options are there!