Alpine Tunnel Trail is a 5.6 mile moderately trafficked out and back trail located near Nathrop, Colorado that features beautiful wild flowers and is good for all skill levels. The trail offers a number of activity options and is best used from March until October. Dogs and horses are also able to use this trail.

DISTANCE
5.6 miles
ELEVATION GAIN
544 feet
ROUTE TYPE
Out & Back

dog friendly

kid friendly

birding

hiking

horseback riding

nature trips

road biking

trail running

walking

forest

views

wild flowers

wildlife

27 days ago

gorgeous views along this trail!

2 months ago

Had a lot of fun hiking this trail first of September. Plenty of shade, beautiful views and a nice variety of wildlife.

hiking
2 months ago

I used to hike this trail as a kid and remember being in awe of the views and history. I can tell you as an adult i was equally in awe. A couple of run ins with some deer on the trail and a few pika making it everything you want in an early morning adventure.

hiking
2 months ago

Loved this trail - lots of flowers, history and scenic views. Saw a couple pika peeking out among the rocks.

2 months ago

Absolutely beautiful. Heavy populated road, a lot of hikers and people. Amazing historic markers with fascinating stories. Lots of Marmots so be listening for the squeaker toy sounds!

3 months ago

The wildflowers are amazing right now! This was a lovely stroll and only got steep at the turnoff for the lake. We struggled to find an established trail on final approach to the lake but everything else was nice and easy. With the lake portion we were on the trail about 3 hours 45.

When I clicked into Apple maps from AllTrails I was told to turn left too soon and ended up at a dead end, but luckily we went back out and made it up to 295 without further issue. 7/25/18

5 months ago

Blocked by waist deep soft snow about 1.3 miles in. Will try again as the grade makes for a great hike up.

Monday, October 16, 2017

Beautiful trail and easy to follow. a good bit of water, snow and ice, so watch your step in areas.

hiking
Tuesday, September 12, 2017

Love this trail! Have done it a couple times, and it never gets old. Views for days. Love hiking to the lake up top too. Tons of marmots and did I mention views for days?

Sunday, July 30, 2017

Such an interesting place with great views, history and beauty.

hiking
Friday, July 21, 2017

First day out for a week of hiking. Nice starter, very interesting site, very tired pooch.

Monday, July 03, 2017

This was a fun hike with great views. I'm not sure which routes everyone posting here took, but at some point last year part of the palisades were damaged in an avalanche, so the road to the east entrance tunnel is closed from the turnoff for Hancock. We opted to hike from the closed off section, and after a mile or two of walking down the road arrived at the tunnel. It was really interesting to see some of the restoration work that was being done and learn about local history from the signs. We hiked up to the top of the ridge over the tunnel (short but steep), but decided not to go any farther since there were still some snowfields.

hiking
Wednesday, August 03, 2016

Wildflowers are popping!

Wednesday, July 20, 2016

Easy peasy hike. Would be great for a scenic trail run or bike. Sometimes the creek is high, but it is slow moving. Take off your shoes and wade across.

Thursday, September 17, 2015

Great trail, beautiful views

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3 months ago

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3 months ago

recorded train trail

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4 months ago

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Monday, September 25, 2017

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Wednesday, August 09, 2017

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Friday, August 04, 2017

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Tuesday, June 13, 2017

Saturday, October 15, 2016

Thursday, May 26, 2016

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