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Nice views on a hike pretty much anyone could do. Decent climb when you come off the fire road for a bit, eventually turns into a wide smooth path for the descent. Probably about half the hike is on wide, smooth dirt path, some of that is fire road. Good scenery and low traffic. Good amount of the trail is off leash for dogs. Tons of water features which adds a lot to the fire road parts.

Was really good minus people having their dogs off leash in non designated areas

Good view of the distant snow-strewn peaks and a reservoir. Wildflowers are starting to emerge now. Not a lot of scenery to look at unless you're at the very highest point of the trail, but besides that it was an easy trail with decent enough reward at the top. Very few people hiking on a Monday afternoon. Only passed two groups of people.

Once you get to the point on this trail where it turns into a road that heads back to the parking lot (clearly marked with a sign) and there's a building where the reservoir water flows out into a river, I'd also suggest heading up the 'Hummingbird Switchback Trail' that goes up to the Ralph Price Reservoir. It's short and you get a good view of the water, and can even follow a trail all the way around the lake if you want. From there you can take the road that goes around the reservoir a bit and also leads back to the parking lot.

Nice hike. Did this last September. Definitely on the easier side of Moderate. Nice and shady for most of the hike. The dam is awesome and a great place for lunch. Some nice views along the way as well.

Beautiful rugged hike. You start out the first half mile or so on a service road but it’s going along side the St Vrain creek, so the scenery is still beautiful. Also I’d say the last 1.5 miles of the loop are coming back down the service road, but again, still feels plenty secluded. We went on a Wednesday and hardly ran into anyone else and parking was not an issue. Once you take the trail (it’s on the left off the service road) it is pretty steadily inclining for a while. Gorgeous views of Longs Peak at the pinnacle. Would definitely do again!

Loved the scenery on Sleepy Lion Trail! Make sure to turn left onto the trail off the main road. I accidentally made a left turn into Hall Ranch and turned my 5 mile hike into over 10 miles, but a lovely mistake! I saw over 20 deer close-up and a huge mountain peak before returning to Sleepy Lion Trail. Also saw eagles, wildflowers, and a rabbit. Finally hit the dam and took Hummingbird Switchback Trail up to Ralph Price Reservoir. Absolutely beautiful around 430pm! Took the road back to the car and enjoyed walking by the river.

Quick morning hike with lots to look at. Trail was essentially dry on 4/7/18 which is always a plus.

Yuck! Bugs everywhere! Doesn’t seem to be in a great part of town ether. Water was also gross.

Got to the lake right at daybreak and sat there listening to the ice melt under the surface. Was an awesome experience!

Great time with my new pup Misha, she did really well for her first time in the mountains!

Nice trails well maintained with great facilities around some nice ponds and next to the south platte river. Saw lots of birds.

Be sure to pay for parking BEFORE entering the parking lot ($6) -- I made that mistake since there's just a couple of stop signs with no clear indication you must pay before entering. It's a completely unmaintained trail. It's hard to find where it splits off from the reservoir trail. It might as well be an off-trail hike. Make sure you're competent with off-trail navigation. The bushes are a bit difficult to pass in a couple of places. It's a very isolated area once you get a couple of miles in. There's a confusing sign before you get to the reservoir that says the only reason you're allowed to enter is for hunting. It's illegal to stay on the trail after dusk.

I didn't make it all the way to grey rock since my knee was hurting. It was still worth going for the experience. I did see some wildlife, and the feeling of isolation is very strong here for how close it is to town (once you get past the reservoir).

Beautiful versatile trail. Took the left off to sleepy lion at the start, great elevation gain to look over the reservoir.
Came down to the reservoir and sat near the water for lunch.
One of my favorite hikes, was crowded but not terribly so.

This was a lovely hike on a sunny, brisk day. I normally don't enjoy hiking up roads, but there was a lot to see in the first 3/4 mile - climbers, dam, creek...The turnoff on the single track trail was lovely and different rock out croppings provided awesome views of the reservoir. Easy afternoon hike. For more details and photos. https://etbtravelphotography.com/2018/03/19/road-trip-to-the-rockies-button-rock-preserve/

Hiked early in the morning. Decided to go out and back on Sleepy Lion trail instead of taking the loop back which would have just followed the road. We also took Professor's Ranch trail which takes you to the top of the Dam instead of going to the bottom where the water outflow is. You will see the sign as you wind down near the Dam. Great hike with views of Long's Peak and the Res.

I was on the trail by 7:45. It was great morning. Only saw one other set of other hikers until the way down. Beautiful views, windy at the top. Great hike.

Hiked with family of 4. Great loop and views.

If you can end up at the reservoir around dusk this hike is magic.

This was an excellent hike. Took my 15 year old along, and she really got into the views. Most of the hike was only borderline "moderate", but as you approach the top there are a few sections that approach vertical. Made for a terrific day hike, and gave my boyfriend the urge to do a lot more of that.

Fun trail. Felt like it should be rated a little more closely to easy than moderate, but the ice today (3/4) made it a little more challenging on the non groomed road parts. a great hike to take friends who might be from out of state (flatlanders) without overexerting them but showing them the beautiful side of Colorado.

Great scenery! Creek, dam, and mountain views. About 1-2" of snow covered the trail on our hike today. Some areas of ice and snow slush. I used spikes but my wife and friend did not. Very doable even at this time year. Will def be back during the warmer season.

Great hike with amazing views of the twin peaks. The sleepy lion trail is actually off leash dog friendly! the dogs had a wonderful time romping around in the mountains. quick hike with amazing views. will definitely do more often

hiking
2 months ago

Should be rated easy, at the trail is extremely flat with a good surface for walking.

2 months ago

My daughter and I loved this trail, it was well kept, beautiful scenery and somewhat of a challenge for us since we don't hike often. We will be back soon!

Good, fairly easy hike. Some pretty views, but the 1st half of the hike is along a dirt road.

Nice trail where dogs can be off-leash. There were a lot of dogs towards the entrance but you eventually get a decent amount of space to yourself while walking in the trail. Beautiful views!! Easy walk, so peaceful.

Awesome family hike, I cannot wait to go back.

I WALK this trail all the time with my dog - and have ridden part of it

Really I want to give this hike a 3.5. The views are great and it’s a manageable hike for all levels BUT you are on a dirt road for good portion of the hike which is not really my jam.

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