I didn't run cross country in high school. The reason I didn't run cross country is because it wasn't offered as a sport. Cross Country was offered as a sport in the early 2000's, long after I graduated.
During the summer before the cross country season, the runners usually go to a camp. At these camps, the runners work on fundamentals, proper mechanics and gain valuable race experience. Now I think that sounds like fun. I would love to have a coach watch me run and tell me if I need to make corrections on my form. Most of the running camps that are offered are only for high school students. I don't fit into that category any more. I'm an adult, but I want to get better.
There are camps out there for adults and I've been using Google to find them. I'm unable to attend any camps this year, but I would love to attend one in the future. I'm sure there are more camps/retreats for adults but these are the ones that I found.
ZAP Fitness Adult Running Camps is located in the Blue Ridge Mountains in North Carolina between Boone and Blowing Rock. This year they are offering five camps. Starting in June, the have a Women's Mini Camp, in July Bear Week and Adult Running Vacation Camp. A marathon prep mini camp in August and an End of Summer Camp in September.
Mammoth Track Project has an adult running camp in September. I would love to attend it, but it is very expensive. The cost is $2,999. Some of the camp details are running twice a day on different terrains, eating organic and locally grown food, proper running development, bio mechanical efficiency, goal launching, body maintenance, nutrition and eating dinner with local Olympians.
Jeff Galloway Running Camps/Running Retreats has many locations which are nice. He has a camps in Vail, Colorado; Blue Mountain Beach, Florida; Lake Tahoe; Athens, Greece; Florence and Rome, Italy and Carmel, California.
Craftsbury Running Camps is located in Craftsbury Common, Vermont and this running camp is for runners of every level and age.
This isn't a camp, but an awesome training run that I want to do someday.
The Western States Endurance Run has schedule training runs on the last 70 miles of the trail. These training runs are to help runners and newcomers to the event to get accustomed to the trail and the conditions on race day. The best part is you don't have to be a Western States runner to participate.