The Newnes Plateau and South Wolgan area is riddled with fire trails, and the first time you head out there it is easy to get lost. With the exception of the Upper Wollangambe (Dumbano) fire trail, pretty much all destinations go via the Bungleboori Picnic Area, now closed, and there are a couple of ways to get there.

The shortest by distance is via Old Bells Line of Road, which runs between the Zig Zag railway at Clarence, and the Glowworm Tunnel Rd. Old Bells Line of Road to Bungleboori Picnic Area is currently (08 Jan 2017) in good condition. It used to deteriorate a lot after rain, but in recent years has been kept fairly well maintained.

The other route is via Lithgow, and then up State Mine Gully Rd, which becomes the Glowworm Tunnel Rd. This is nearly twice as long. The road condition may be better than the route above after heavy rain, but these days the above route is usually in good condition.

The routes listed below are generally suitable for 2wd cars with plenty of clearance. Low clearance vehicles may have difficulty on some roads, particularly those to the Natural Bridge and Deep Pass. Note that the routes are all dirt roads, and need regular grading. The trails can deteriorate significantly between gradings, and may become difficult or even impassable for certain vehicles.

In current conditions, I take about 10 mins via Newnes Forest Rd, and 18 mins via Lithgow.

The Glowworm Tunnel Road past Bungleboori Picnic Area is in below average condition (08 Jan 2017) to the Deep Pass turnoff, and also in fairly poor condition beyond there.

Zig Zag to Bungleboori Picnic Area via Old Bells Line of Road

0.0 Turn off Bells Line of Road at Zig Zag railway turnoff (no longer signposted, as the Zig Zag Railway is currently closed). Head right, following the railway tracks, then left across the tracks. Keep right as you head up the hill to avoid entering the sawmill.
4.8 Turn left at a sharp bend - the Upper Wollangambe (Dumbano) fire trail (currently signposted as Wollangambe Trail) turns off to the right.
8.8 Turn right at the junction with the Glowworm Tunnel Rd.
11.1 You reach the Bungleboori Picnic Area on your right.

Zig Zag to Bungleboori Picnic Area via Lithgow

0.0 From Zig Zag, continue along Bells Line of Road (actually the Chifley Hwy at this point) into Lithgow. Turn right at the traffic lights at Bridge St and and then right again into Inch St immediately after you cross the railway tracks. Turn left into Atkinson St, just after a right hand bend. After crossing a level crossing and a bridge, this becomes a dirt road (State Mine Gully Rd) as it heads steeply up a hill, and then becomes the Glowworm Tunnel Rd.
15.5 Pass a junction with the Newnes Forest Rd on your right
17.8 You reach the Bungleboori Picnic Area on your right.

Bungleboori Picnic Area to Waratah Ridge car park (Hole-in-the-Wall car park)

0.0 From Bungleboori Picnic area continue straight ahead
3.1 Turn right at Waratah Ridge Rd (currently signposted)
6.7 Keep left on Waratah Ridge Rd at the intersection with Eastern Boundary Rd (currently signposted)
7.1 Turn right, still on Waratah Ridge Rd, at Two Trees Rd intersection (signposted)
9.1 Keep right at a Y intersection
10.1 Keep straight ahead at a 3-way intersection
10.7 You reach the Waratah Ridge car park at the locked gate

Bungleboori Picnic Area to Galah Mountain car park (Rocky Creek car park)

0.0 From Bungleboori Picnic area continue straight ahead
3.0 Keep straight ahead at Waratah Ridge Rd (signposted)
13.4 Turn right at Galah Mountain Rd (signposted to Rocky Creek)
13.7 Pass Barcoo Swamp camping area on your right
13.8 Veer left at a Y intersection
18.5 Turn right at a locked gate (the starting point for a number of canyons such as Surefire and Heart Attack)
18.8 Pass a locked gate on your left (the starting point for a number of canyons such as Breakfast Creek, Closet, Galah etc)
19.9 Reach the Galah Mountain car park

Bungleboori Picnic Area to Old Coach Road car park

0.0 From Bungleboori Picnic area continue straight ahead
3.0 Keep straight ahead at Waratah Ridge Rd (signposted)
13.4 Keep straight ahead following signs to Glowworm Tunnel at Galah Mountain Rd (signposted)
17.9 Turn right at a Y-intersection on to the Old Coach Road (signposted).
22.0 Reach the Old Coach Road car park on your right.

Bungleboori Picnic Area to Glowworm Tunnel car park

0.0 From Bungleboori Picnic area continue straight ahead
3.0 Keep straight ahead at Waratah Ridge Rd (signposted)
13.4 Keep straight ahead following signs to Glowworm Tunnel at Galah Mountain Rd (signposted)
17.9 Keep straight ahead at a Y-intersection (Old Coach Road, signposted)
24.6 Reach the Glowworm Tunnel car park

Bungleboori Picnic Area to Deep Pass

0.0 From Bungleboori Picnic area continue straight ahead
3.1 Pass Waratah Ridge Rd (signposted) on your right
9.4 Turn right at the end of the pine plantation into Eastern Boundary Rd (signposted). This is just after the double road starts, and a large cleared area runs along side the road for the next 4km
10.0 Turn left at the second intersection at a large clearing
10.5 Veer right at a Y-intersection
12.6 Keep straight ahead as a fire trail turns off to the right
13.1 Turn right at a Y-intersection. A sign points left to Mt Cameron, right to Deep Pass.
14.0 Keep straight ahead as a fire trail turns to the right. A sign points straight ahead to Deep Pass.
14.1 Keep straight ahead where a road heads left
15.2 Reach the Deep Pass car park

Bungleboori Picnic Area to Natural Bridge

0.0 From Bungleboori Picnic area continue straight ahead
3.1 Pass Waratah Ridge Rd (signposted) on your right
9.4 Turn right at the end of the pine plantation into Eastern Boundary Rd (signposted). This is just after the double road starts, and a large cleared area runs along side the road for the next 4km
10.0 Turn left at the second intersection at a large clearing
10.5 Veer right at a Y-intersection
12.6 Keep straight ahead as a fire trail turns off to the right
13.1 Turn right at a Y-intersection. A sign points left to Mt Cameron, right to Deep Pass. Note that while you can take the Mt Cameron trail at this point, it crosses Dinner Gully, a 60m descent and ascent, and it is better (particularly if you have a 2wd car) to take this detour.
14.0 Keep straight ahead as a fire trail turns to the right. A sign points straight ahead to Deep Pass.
14.1 Turn left on to a fire trail.
15.5 Turn right as you rejoin the Mt Cameron fire trail. This is just after a steep rocky downhill, the most difficult section of the route.
16.4 Pass the park boundary sign. A closed fire trail branches off to your right.
16.8 Reach the Natural Bridge car park. There are a couple of steep water bars in this last section, and 2wd cars are likely to bottom out on these. You can park in a number of places before the actual car park.