If you have Verdant Hollow Flight Path, two ways to get to Mugamba overlook, without using a glider etc...
North Way (easy path)
Head out of VH up the dirt path directly north of the flight master. It turns west up the hill to a rope bridge by a tree.
Cross the rope bridge & continue west up the hill past the signpost.
Just a few yards past the wagon on the left & the 'sickened travel beast', there's a dirt path going up the hill veering off to the left. Take this dirt path up through 'Shrine of Pa'ku' zone. You'll probably be attacked by the horde flight master at the top of this hill, turn right & just keep riding the path directly west (ignore the path that goes to the left).
You eventually come to a small stone bridge, cross this bridge and turn right immediately at the end of it.
There you'll see the path up to 'Mugamba Overlook'.
South way (harder, longer path)
Head down the south-west path from VH , you will come to the horde / hostile area 'The Zocalo'.
Head west through the Zocalo. You should be able to remain mounted if you don't stop & don't have a coarse leather barding buff & just manage to not die (though it may get close depending on your ilvl).
If you look at the map you will see a bridge directly above where it says 'Terrace of the Crafters' on the map, you want to head over this bridge & west out of 'The Zocalo'.
(I'd only recommend checking the map either at beginning of 'The Zocalo' zone or when you are on a straight enough path to keep running mounted & quickly check map.)
Once over the bridge across 'Kingsmouth River', Ride the north path signposted 'Temple of the Prophet' at the end of the bridge, heading up 'Old Merchant Road'.
Keep going north past the next signpost (you don't want to follow 'Temple of the Prophet' path, just keep going north)
You'll now be in the 'Mount Mugumba' area. At the next bridge (the small stone bridge mentioned in part 1), don't cross it, but look left. You'll see a dirt path uphill next to the rocky outcrop near the waterfall & a 7th Legion Scout stood at the bottom of the path.
Up the dirt path & you're there.
Don't forget to unlock the flight path.