“Out of 5 stars, the trail is a 2. The summit is an 11.”
— Nick Wilder
Though quite steep, the surface is perfectly smooth and runnable the whole way - it's just a question of lung capacity!
You don't do this trail for run itself, you come for the views!
This a paved/dirt road (used to service communication towers), so it's not a very nice trail, but the scenery is just spectacular. It just grinds up and up from the beginning to end; not terribly steep, but without many rests. Near the top, the road turns left to a communication tower at Red Mountain. It's not worth the side trip, so take a right on dirt road for the final bit that curves around to the summit of Bald Mountain at 2,729'.
The summit is certainly one of the best in the bay area: perfect 360 degree views in all directions. Vineyards, Napa & Sonoma valleys, Berkeley, Oakland, Mt Tamalpais, the SF bay, and even snowy Sierras on a clear day (130 miles)!