Fuel EX 9.8. Mostly sunny, cold at the start in the high 30's but warmed up to near 50 by rides end. Good, hard ride but slow pace as my legs were tired from a hard ride yesterday, plus I was wearing a lot of clothes and did a ton of climbing. I was the only one there at the start, didn't see another rider until 2 hours in but the trailhead parking lot was pretty packed at the end. I saw 7 deer today, a record for Atwood. There was an eight point buck on the Whiz Bang trail that I saw 3 different times. The other deer were all does, spotted on the Founders Loop and the Marsh trail. Started out with 3 trips on the Founders Loop for warmup, marsh & prairie trails over to Big Wheel where I did 2-1/2 loops, then crossed over the river to do the harder trails on the North side. I did 2 full loops, once in each direction before crossing back to do an additional 1-1/2 loops on Big Wheel (4 trips total), then back on the Prairie trail to do an additional trip around the Founders Loop (4 total), Marsh trail to the mid trails and back to the car. Lunch and rehydration at the Hairy Cow in Byron.