We did this a couple months ago and it was amazing! I've been wanting to again.
This is a beautiful trail system in San Marcos. We'll hike between 2 and 3 miles. There is a pond about half way through that the pups can cool off in. These are natural trails with some hills...I would call it moderately challenging. After the hike, those that wish can follow us to Raymond Lucio Park and the San Marcos River to cool off for a bit.
The mosquitoes have hatched, so bring your bug spray and plenty of water for you and your dog(s). We can meet at Buckee's to carpool/caravan if we want/need to (I can fit one person and one dog in my car). Please post if you would like to carpool/caravan. Otherwise, meet in the Aquarena Springs parking lot. We'll hike for about an hour. Bring a picnic lunch if you like.