Houston Happy Hikers will hold a 10km/5km walk in the Houston Museum District Sat., Dec. 13. The event is noncompetitive, so walkers, joggers or runners can start at 5501 Main St. anytime between 10 a.m. and noon to finish by 2 p.m. The trails are along paved sidewalks and lead through the Museum District. Pets welcome but not allowed in the Jones Building, St. Paul's Church, or businesses along the route. Participation is free, but donations are welcome.