Sunday, Oct 29, 2017
This Event Took Place Sun. Oct 29, 2017

Steep Rock Trail Series

Just a little over an hour from the northern suburbs of NYC, in the northwest hills of Connecticut lies one of the best kept secrets in trail running around! If you are ready for a new challenge of some awesome trails, then the NEW Steep Rock Trail Series brought to you by Steep Endurance is for you! In cooperation with the Steep Rock Association, the Steep Rock Trail Series gives runners a chance to experience the idyllic trails of the Steep Rock Preserves in Washington, CT. Each preserve and race offer its own sweeping viewpoints, lush forest singletrack trails and hillsides, babbling brooks and streams, old rail beds, rural landscapes, and of course the ever present New England fall foliage. With each subsequent race, runners will progress from a 10K up to a Half Marathon. Each race will also have a 5K offering for those who are new to trail running or looking for a shorter distance.

Macricostas 10K/5K: Sunday, September 24, 2017
Hidden Valley 15K/5K: Sunday, October 29, 2017
Steep Rock Half Marathon/5K: Sunday, November 5, 2017

About the Event

In the second race of the series, the Hidden Valley 15K, runners will get to experience the beauty of the Shepaug River, lookout summits of the valley below, the quartz mine, and the iconic Thoreau Bridge at the entrance to the park. The 15K course is more gentle rolling in nature and is not quite as much elevation per mile as the Macricostas 10K, but still has it’s challenges with plenty of singletrack and a few short steep climbs to lookout points.

The shorter 5K option will include at least one of the lookout points plus the crossing of the Thoreau Bridge just before the finish. Again, hikers and walkers are more than welcome in the 5K!


Registration starts on Saturday, June 24, 2017 for all 3 races in the series.

**Runners can sign up for all 3 longer distances (10K, 15K, Half Marathon) OR all 3 shorter distances (5K) at a discounted price for the trail series! Please see registration link above or go to the ultrasignup links below!

Macricostas 10K/5K
Hidden Valley 15K/5K
Steep Rock Half Marathon/5K

T-shirts will be offered to all pre-registered runners in the 15K. Additional Shirts can be purchased for $20. Please see event store link above.

A portion of your entry fee and/or proceeds from the race series will go to the following non-profit beneficiaries:
Steep Rock Association, Families United in Newtown, Washington Ambulance Association, and Washington Volunteer Fire Department.

Refund Policy: There will no refunds and/or no transfers of your registration or bib to any other person. Entry fees collected are used to develop and produce the event, starting well in advance of the race date--including course preparation, race supplies, permits, and administration.

Hikers/walkers are welcome to do the 5K. Runners wishing to drop down from the 15K race to 5K may do so before race day by emailing the race director.

Course Description

15K: The second race in the Steep Rock Trail Series, the Hidden Valley 15K, starts near the entrance to the preserve where runners will begin with a gentle singletrack climb in the first mile before reaching an overlook point around the 1.25 mile mark. A few short steep ups and downs along with gentle rolling trails for the next few miles as the course winds towards the northeastern section of the preserve. A quick trip onto the pavement of Sabbaday Lane and it’s another quick climb to the highest point on the course just past 5 miles. A 300’ downhill drop in the next mile provides a welcome relief to the runners as they descend back down towards the river. The next few miles are generally flat along the river with a little side trip through an old quartz mine. Just before mile 8, it’s across the river on a several tiered wooden bridge with steps leading to the opposite side. A quick short 3/8 mile climb with a few switchbacks and it’s all downhill to the finish for the last mile on sweet buttery singletrack. A quick trip across the Thoreau Bridge and runners arrive at the finish line! This is an extremely beautiful course, but requires strong discipline to start slow and finish strong!

5K: The 5K course will start in the same direction as the 15K course, with a slight variation in the first mile. Runners will then head along the Van Sinderen Trail parallel to the river before dropping down to the wooden bridge at the northern end of the preserve. They will then follow the 15K course for the last approximately 1.5 miles to the finish.


Each race in the Steep Rock Trail Series will offer awards in the following age groups for both men and women:
Overall, 19 and under, 20-29, 30-39, 40-49, 50-59, 60 and up.

Special “Steep Rock Trail Series” awards will be given for series winners in the following categories:
Overall Male/Female (1st, 2nd, and 3rd), Masters Male/Female (1st).

Medals will also be given to any participant who signs up for IN ADVANCE and RUNS in each of the three Steep Rock Trail Series events.

Post Race Celebration

You’ve just finished a super challenging course! Enjoy your accomplishment, sit back, relax, and don’t forget to cheer on all the runners coming in behind you! We will have the usual spread including bagels, bananas, pizza, non-alcoholic hydration options. **There is no alcohol permitted in any of the Steep Rock Association Preserves.

Additional Info

For more info, please go to

Local time: 12:09 PM


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