If you're using Google Maps, it takes you to the right area--disregard after it tells you to turn left off the cliff onto Glenbrook Rd, (which you pass and is a driveway, not a road) continue a mile or two. Alsea Falls is a few miles passed the mountain bike area (left side) 1000 feet to the right. You literally park and walk 50 feet and you're there. However, walk across the bridge, turn left follow the trail to Green Peak Falls. There are no signs so make note: the trail turns into a gravel road at a decline (3/4 mile into hike). To the left and over the bridge-thing there's a parking lot. Don't go that way! Follow the path around a bend to the right. There's a sign, which you can't read until you're standing next to it, propped against the bottom of a tree. The trail to Green Peaks starts there. Quick hike, gorgeous, and ropes tied to the trees near the Falls of you want to climb up to the top (maybe 20 ft.).
Brought the dog, everyone was friendly. Multiple dogs off leash--mine was for a lot of the run.
Also, if you do turn left and go over the bridge, there's a road across the street (to the right a bit) which takes you on a nice hike, no falls, just peace and quiet!!
Went to Alsea Falls and while cool to take photos around it's not really a hike. You park in the parking lot and then there it is. Never made to Green Peak but I will be going back since I read about how it's worth it. Gotta see it now!
Went on the Green Peak Falls trail based on the positive feedback on this page, nice trail however would not recommend for smaller children. We hiked with our 3-year-old daughter and it was certainly challenging taking sharp, steep switchbacks and crawling over fallen logs. Older children should have fewer problems. Watch out for narrow trails with drop-offs. Dog did great and enjoyed the hiking, people practice good dog etiquette here.
The place was absolutely beautiful! I took my dogs and they loved it! However things aren't clearly marked to find where you want to go. I took a trail that was suposed to head towards a fall and it ended up being a dead end. Also many many people were there. It seems to be very well known and very well traveled.