Here's a fairly easy SOTA summit not too far from Boise. It has good views from the top and some simple navigation challenges as it's cross country with no trail. This could be a good summit to try out using a GPS - it might help you end up in the right place.
Spencer Butte is a Eugene city park about four miles south of downtown. The address for the most convenient trailhead is 85401 South Willamette Street and the trailhead parking lot is well signed as the Spencer Butte Trailhead. This trailhead has the shortest routes to the summit.
UPDATE Dec 2021 - Badger Butte (and other summits in the area) are not accessible by regular motor vehicle from Dec 1 to April 1 due to closure of NF-2610 and other routes to vehicles more than 50 inches wide. A hike, snowshoe, ski, bike, snowmobile or dog sled would be the way to go. See the photo below.
It was a winter wonderland on Bells Mountain above 2000 feet on Christmas Eve, pleasant to look at, not too bad to hike in. Remember, it's always best to park on the right side of the gate and hike the road - it's an easy 1.6 miles to the summit.
The directions below are from Interstate 5 - some of the mileages seemed a bit off but otherwise it should get you to the gate.
This is the only 'drive-up' ten pointer in Oregon - but perhaps because it's eight hours from the Willamette Valley it remains a pretty quiet place. It's actually a near drive-up - the walk beyond the gate to the summit and AZ is less than a half-mile. The scenery and silence of this high desert place have made it my favorite spot in the world for more than twenty years with many trips bringing family and friends to see this place.
Diamond Craters is administered by the Bureau of Land Management as an Outstanding Natural Area. This is a great example of Oregon High Desert and although it’s not on the way to anything, it is very much worth visiting. It is about 55 miles southeast of Burns, Oregon.
UPDATE Nov 2022 - http://www.pnwsota.org/blog/ag7gp/2021-january-27/roxy-ann-peak-or-january-2021.
Roxy Ann Peak is a short 1.5 mile 700 foot gain hike just east of Medford surrounded by Prescott Park.
Bobs Mountain is fairly close to Portland, and with a short respite from the rain, an activation plan was hatched. I had the company of Grover, KG7O for a joint activation. We had a good time on the short hike to the summit on a four-wheel drive road and had a sucessful first time activation for this peak.
Even more updated here: http://www.pnwsota.org/blog/k7atn/2021-june-07/updated-monte-carlo-wa-june-2021
There appears to be a false summit around 5160 feet near the "end" of the trail to Bandera that is about half mile and 80 feet of elevation gain to the actual summitr.