Where to stay
Hotels in Tbilisi
Rafting and river days within reach of Tbilisi
The Pshavi Aragvi and the Mtiuleti Aragvi meet at Zhinvali, about 45 minutes north of Tbilisi on the Georgian Military Highway, and that confluence is the heart of the country's easy rafting scene. Operators run trips from roughly April to October, with the strongest flow in May and June from snowmelt. Most half-day runs suit beginners from about age twelve, with helmets, paddles and a safety kayak provided. Book a morning slot, then use the afternoon for the Ananuri fortress viewpoint above the Zhinvali reservoir, which teenagers photograph endlessly.
Base yourselves in Tbilisi for this rather than pushing north. The drive from Rustaveli or Vera is under an hour; from Kazbegi it is two and a half hours on a road that closes in heavy snow. If your group wants more time on the water, the trialeti and Tetri Aragvi sections near Pasanauri add a second day with livelier rapids. Skip the horse-riding touts at the reservoir car park; the animals are often underfed and the insurance is unclear.
Cycling and swimming in Kakheti
Kakheti rewards families who ride rather than drive. The lanes between Sighnaghi and Bodbe, and south towards Tibaani, are quiet, rolling and shaded by walnut trees; a 25 to 35 kilometre loop is a comfortable half day for teenagers who ride at home. Guesthouses in Sighnaghi rent basic mountain bikes, though serious riders should bring or hire properly in Tbilisi. Combine the ride with the Bodbe monastery garden and a stop at a qvevri winery where the adults taste and the teenagers get churchkhela and grape juice.
For swimming, head to the Ili lake area or the pools attached to hotels around Telavi, since wild river swimming here is genuinely risky and not worth the argument. The best months are late April to mid-June and September to mid-October: July and August push past 35 degrees in the Alazani valley and cycling becomes a dawn-only activity. I would book a guesthouse inside Sighnaghi's old walls for two nights, then a hotel with a pool near Telavi for one, rather than attempting day trips from Tbilisi each time.
Hiking to Gergeti and around Kazbegi
The walk from Stepantsminda (Kazbegi) up to Gergeti Trinity Church takes most teenagers 60 to 90 minutes on the direct trail through the village, gaining around 400 metres. It is steep but short, and the alternative is a 4x4 track that costs a flat rate per vehicle. Start by 8am to beat both the heat and the tour minibuses that arrive from Tbilisi around 11. Proper shoes matter; the path is loose in places and muddy after rain. From the church, confident walkers can continue towards the Sabertse pass for another hour.
Allow two nights in Stepantsminda so the hike is not squeezed. The drive from Tbilisi is roughly three hours via Zhinvali and Gudauri, longer in winter when the Jvari pass requires care. June to September is the window; October is beautiful but cold at 1,700 metres and the guesthouses thin out. Rooms fill fast in July and August, so reserve a Stepantsminda hotel with breakfast included well ahead. On the way back, stop at the Russia-Georgia Friendship Monument at Gudauri for the paragliding viewing and the panorama.
Caves, canyons and the west
If your teenagers are more interested in geology than churches, Kutaisi is the better base than Tbilisi for a few days. Prometheus Cave near Tskaltubo runs guided tours on a fixed schedule through lit chambers, and the nearby Sataplia reserve has dinosaur footprints and a glass viewing platform. Both are 20 to 30 minutes from Kutaisi by car. Martvili Canyon, about an hour north, offers a short boat ride on the Abasha river through green gorges; it is a 40-minute visit, so pair it with something else rather than driving out for it alone.
Further west, the Okatse Canyon suspended walkway is not for anyone with a fear of heights, but teenagers tend to love it. Mestia and Svaneti are a bigger commitment: a five to six hour drive from Kutaisi, or a short flight to Mestia's Queen Tamar airport, and best from June to September. I would give Svaneti three nights or not go at all. For a first family trip, split seven to nine days between Tbilisi, Kazbegi and Kakheti, and leave the far west for a return visit.