I have had good luck with trails.com and of course Google Search. Type in name of trail or trail head and there it is. Also when I zoom in close on Google Maps to a particular trail head such as Mount Rose then click on the name then many photos are displayed and the website for that trail head is posted and the website usually has a detailed topo map of the trail/s in that immediate area plus other info such as Galena Park near Reno that has detailed maps of Thomas Creek, Galena creek and Whites creek trails in the Humboldt National forest.
Google and Bing search are always my friends. I also use Benchmark maps for many outdoor activities and they are my favorite atlas.
