If you’re the kind of runner who tires of pounding the pavement in weekend 5Ks — especially in the heat of summer — here are two races to put on your calendar: the Henricus Dauber Dash and the James River Splash and Dash.

First the Dauber Dash: This 5-mile mud race and obstacle course, now in its fourth year, takes you through Henricus Historical Park and the Dutch Gap Conservation Area and, according to the Sports Backers,  “is packed with plenty of mud, dirt, and obstacles along the way to keep you challenged while having the filthiest time of your life!” Last year 635 people participated. There is also a 1-mile Mud Guppies Kids Run, for kids ages 8–14 at 11 a.m. This course features its own engaging obstacles and finishes through the same grimy mud pit as the adults.

Registration just opened for the Henricus Dauber Dash. Online registration is available through June 21 at 11:59 p.m. The current entry fee is $30. The entry fee for the Mud Guppies Kids Run is $10. Both prices are set to increase May 21. For more information, visit www.sportsbackers.org or call (804) 285-9495.

Now the James River Splash and Dash: This second-year event is a fund raiser for the James River Association. Held on July 14th, “the James River Splash & Dash is a competitive tube race which takes place on Belle Isle. Participants run a 5k trail course, grab a tube, paddle (with their hands) across a stretch of the James, and run their tube to the finish line. After the race, JRA hosts an after party that includes a band, food, beer and more!” Click here for more.