The Dmoain XC track is a pleasant little 2.5km shared used trail, constructed by Dirt Art in 2016 with mountain bikers in mind. It provides a fantastic reason to head up to the Queens Domain for a quick burst with your friends when the trails call and the Meehan or Mt Wellington is too far away. While all levels of riders will enjoy this trail, it makes for a great introductory ride with friends and family who are new to mountain biking. You can just drive up and enjoy this short trail or you can combine it with Soldiers Walk and many other trails around the Domain for an hour or more of exploration.
If you just want to ride the MTB track, then your best bet is to drive up and park in the Soldiers Memorial Oval car park near the junction of Cleary's Gates Road and Upper Domain Road.
If you don't know Hobart well, then the easiest way to get there is to head out of the CBD on Macquarie Street as though you are heading over the Tasman Bridge and then as you leave town (well before you cross the river) look out for the signs to the Cenotaph/Domain or Aquatic Centre on your left). Turn down here and then follow the road as it goes past the Hobart Aquatic Centre and then heads up the hill onto the Domain. It is about 1km from where you turn off the Highway to the car park and you will pass the Domain Tennis Centre on your left and then just before you come to a junction you will see a big oval on your right. Turn right at this junction (onto Upper Domain Road) and there is a large car park about 75 metres down the road on your right where you can park. There is also a rougher overflow car park on the left.
If you're riding your bike from town, just head down to the waterfront and follow the Hobart City Cycleway (running along the river side of Davey Street) out of town towards the Cenotaph. If it helps, note when you cross Evans Street (which is the last street you'll cross with cycle lights). About 600 metres from Evans Street, just past the Cenotaph, you come to a small road (Mcvilly Drive) which is where the cycle path starts properly and which has the little known status of being the most cycled section of road in Tasmania (between the cycle track and the car parks / toilet just to your right). Instead of turning right and jumping onto the cycleway, head left along this road and go under the highway, and then when you come to the T Junction on the other side of the highway, head left again. 75metres up this road you will see a really obvious multi-use gravel track (Soldiers Walk) heading off to your right. Carefully cross the road (there's lots of distracted drivers pulling out of the aquatic centre here) and follow this gravel track for 1.4kms until you come to a junction just below an oval to your left (you'll see some steps steps heading up onto the oval). This is just before the track drops out onto the road, so if you come to the road, just backtrack 100 metres. Turn left onto the track that runs up onto the oval (besides the steps) and then just follow the gravel track right around the oval and you will find yourself at the carpark mentioned above.
There is a public toilet over in the Athletics Oval building, and another one down by the Cenotaph.
The main circuit is about 2.5kms in length and can be ridden in either direction. I personally prefer to ride it in a clockwise direction, but to be honest it's such a short track you may as well ride it both ways and make up your own mind.
The easiest way to extend this track is to ride up from the Cenotaph via Soldiers Walk, but there is a range of tracks (of various quality and legality) on the domain and so it can be a fun place to explore by just following you front wheel. I've also mentioned the Joggers Circuit in the options below, because although a very basic ride, it is a nice safe area to take kids.
This is a multi-use trail and is used by walkers (I know not why) and families with young kids, so always expect a walker around the next corner or a young child on a bike not paying attention.
If you want to do some serious riding head to the Meehan Ranges or Mt Wellington.
As you came into the car park you would have crossed a gravel track (the top of Soldiers Walk). Jump onto this trail and follow it to the left (away from the oval and towards the junction you drove through). It soon swings to the right (0.1km) and crosses the road just before you get to the junction and then intersects with another track (0.15km from the start). Turn left onto this track and cross the road heading to the top of the Domain and you will see the MTB track on the other side of the road.
From here basically just follow the track as it gently switchbacks its way up to the top of the Domain Hill abut 1km away. Enjoy the views and then head back down around the other side. Several times around the loop there are exits onto the road and various car parks. Most are fairly obvious, but there is one junction at about the 2km mark, where you need to take the left fork (the right fork just takes you 20 metres onto the road above the water tank so it is no real problem). You then go through a few more switchbacks until about 2.3km where you come to another junction.
Going right will drop you out onto the joggers loop circuit which (after another 250 metres) will take you back to the start of the circuit at the junction.
Going left at this intersection drops you down a couple more switchbacks and then out onto the joggers circuit loop a bit further along. From here you can either just turn around and head back up the trail to do the loop in reverse, or you can continue to follow the gravel track around to the left (250m) until it drops you out onto a closed road (this is the joggers loop). This is a fairly flat loop which goes around the hill and drops you back out at the junction again. It's about 1.8km from where you drop onto the road to the junction this way.