I paid a visit to Ponderosa State Park in McCall, Idaho on 7/19/2018. The largest of two species measured were as follows:
Ponderosa Pine (Pinus ponderosa var. ponderosa) 10.8' x 174.1', 12.2' x 161.6'
Douglas-fir (Psuedotsuga menziesii var. glauca) 11.3' x 154.2'
McCall has become a tourist town featuring boating and hiking in the summer and winter sports in the cold weather. Much of the state park is on a thousand acre peninsular that extends into Payette Lake and is quite picturesque. The park was established in 1905 and timber cutting along the lake prohibited in 1918. I did not determine how far from the lake edge the timbering prohibition extended.
The University of Idaho has its Field Campus adjacent to the camping area and also contains plenty of old impressive trees. This campus was a summer school and training site for new foresters studying at the university.
I camped here back in 2011 and failed to get the height of a 174" girth tree in a campground. I did not find that tree on this visit so I just picked an average looking area in the campground area and measured six trees in about 3 acres.
Elevation at the site 5000'.

Click on image to see its original size
12.2' x 161.6'