Sonic Endurance offers professional race directing services for running and multisport races in Connecticut. We currently provide logistical and production expertise for the following three races.


Greater Hartford Quarter Marathon



The Greater Hartford Quarter Marathon features the tagline “You Should Try Other Distances.” Slightly longer than a 10K at precisely 6.55 miles, this race features two laps around the West Hartford/Farmington Reservoir’s Red Trail. The 2017 version of the race will take place on April 1. Register here.

Trying this race for the first time? Check out our Beginner’s Training Guide here.

Looking to PR this race? Then the Intermediate Training Guide is for you.


Solstice Sprint 5K


Not up for two laps around the Farmington/West Hartford Reservoir’s Red Trail? Not to worry, as the Solstice Sprint 5K features a slightly abbreviated lap around the trail. The course features one sizable hill at mile 1, with a rolling downhill remainder of the course. Featuring an evening date in early June, it’s a perfect midweek first race or test of speed.

First time 5Ker? Check out our Beginner’s Race Plan here.

Looking to lower your 5K time? See our Intermediate Speed Plan here.

Hogsback Half Marathon


The Hogsback Half Marathon is a perfect way to cap off a summer of training. Featuring a net elevation loss on this certified 13.1 mile course, the RRCA State Championship Half Marathon field is sure to push you to your best time. This race also features a first-timer friendly early start to participants anticipating to run a time slower than 2:30. And don’t forget the feast at the end! The 2017 Hogsback Half will take place on Sept. 30th. Registration is available here.

First half marathon? No sweat! Check out our Beginner’s 13.1 Plan.

Want to lower that time? Here’s our Intermediate 13.1 Guide.