I approached Bryant Mountain from the town of Malin. Drive east from town on the main Malin Road about 3 miles to where it crosses the California/Oregon border, turn left on Loveness Road. Loveness Road is right on the state border and is paved but not very wide. It climbs a small hill and in 1.75 miles from Malin Road, turn left on a gravel road. There is a gate on the road that is closed and locked from November 1 through April 15 every year. I think the BLM wants to keep off road vehicles from tearing up their roads during the winter.
Once on the gravel road follow it north as it passes under a couple of large electric transmission lines. At about 3.0 miles from Loveness Road there is an intersection with the main road continuing north, go right here and follow the road another .7 mile to where the road is gated. Park off the road here, you are at the trailhead.
The gate on the access road is at about 5,430 ft elevation. There is a road to follow all the way to the summit. Follow the road north from the gate and around the north end of the small unnamed lake at elevation 5566. The lake is very shallow and in the late summer it is little more than a muddy cow wallow.
As the road turns and heads more southeasterly and directly at the summit area, the road forks. The right fork stays in the bottom of the valley, take the left fork as it starts gently climbing towards the summit. Soon you leave the trees and are more in the open grassy areas. After you climb another couple hundred feet, you will be able to see the fire lookout on the summit. Just keep heading for the fire lookout. A few hundred yards before the fire lookout, you pass by an old collapsed comm tower and then the road becomes less distinct. Pick your way through the short brush and go up to the summit.
The total hike covers about 6.5 miles, gains about 1,050 ft in elevation, and took me 2.2 hours.