Flash Mountain & B-1510 via B-1500
4.3 mi · ▲ 530 ft · 1 hr 42 min
Flash Mountain & B-1510 via B-1500 is a 4.3-mile out-and-back near Sine, WA. The route reaches Flash Mountain at the turnaround, 2.1 miles in. It climbs 530 ft, with sections as steep as 18% grade. It scores 74/100 on the Ambleway Wildness scale: backcountry feel.
Elevation
Getting there
Directions
Flash Mountain & B-1510 via B-1500
4.3 mi · ▲ 530 ft · 1 hr 42 min
Elevation 2,171–2,595 ft
Out & Back
Trailhead: B-1510 · 46.98199, -123.15872
Weather Sep 5: Overcast, high 63°F / low 47° · precip 31% · wind 5 mph · sunrise 6:37 AM · sunset 7:48 PM
- Start on B-1510, heading E.
- 200 ftBear right onto B-1511, heading E.
- 50 ftBear left onto B-1510, heading NE.
- 0.3 miContinue straight onto B-1500, heading NE.
- 50 ftContinue straight onto Larch Mountain West / Upper Twin Peaks, heading NE.
- 1.1 miSharp left onto C-4400, heading S.
- 0.7 miReach Flash Mountain, then turn around and head back the way you came.
- 0.7 miSharp right onto Larch Mountain West / Upper Twin Peaks, heading SW.
- 1.1 miContinue straight onto B-1500, heading SW.
- 50 ftContinue straight onto B-1510, heading SW.
- 0.3 miBear right onto B-1511, heading W.
- 50 ftBear left onto B-1510, heading W.
- 150 ftArrive back at the trailhead.
Each distance is the walk from the previous step. Tap a step for a map of its junction.
Trail surface
Weather
Sunset
The best sunset spot on this hike is right at the trailhead, so there is no walk out. Be there by 7:28 PM to have the sun's last 20 minutes of sky before it sets at 7:48 PM. Your car is right there — dark at 8:20 PM.
Other ways to reach this destination
More from B-1510 Trailhead
- Larch Mountain West / Upper Twin Peaks 3.5 mi · ▲ 337 ft
- B-1500 via Larch Mountain West / Upper Twin Peaks 4 mi · ▲ 170 ft
- B-1410 via Larch Mountain West / Upper Twin Peaks 4.4 mi · ▲ 532 ft
- C-8900–Divide Trail North, 3 sights 7.8 mi · ▲ 728 ft
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