CENTRAL OREGON -- A Portland man was found dead on Sunday afternoon about a mile north of Hwy 20 at Milepost 28 by some ATV riders. Lieutenant Chad Davis with Deschutes County Sheriff’s Office says investigators learned that 36-year-old Eric Sims of Portland was headed to Pine Mountain Observatory. He says police found Sims car at Pine Mountain campground. Davis says they learned Sims left the campground on a red mountain bike but became separated from the bike and walked several miles in the area. Davis says Sims died of exposure and evidence shows his body had been at the location for several days. There is no evidence of foul play.