The shuttle is easy, leave a vehicle at the pull-off ~200’ up Bobbin Mill Road (just outside of Warren) and then head 3 miles south on route 100 till you come to a picnic area on the right.
The picnic area is situated at the confluence of The Mad and Austin Brook. If the water looks high enough to run the messy rapids above the confluence, you have a solid flow. This can be good for the boogie, but will make the larger rapids formidable. If the constricted rapids right below the picnic area look low, the rest of the run will be worse, and it’s probably best to head to the Lower Mad which holds water well.
From the put-in there is no warm up. The first rapids are the hardest of the run, excluding Warren Falls, and can be easily scouted from river right. The sequence consists of some quick lead-in before tumbling over a ledge into a pool. This ledge can have a rather ugly looking hole at higher water. At the outlet of the pool, the river twists through constricted bedrock with a few spots to avoid, namely the protruding piece of ledge at the bottom. If these aren’t your cup of tea, you can easily put on just below. The next drops are similar in nature but a step down in difficulty, and quite fun. From here you are treated to boogie, with the occasional ledge or slide thrown in. At lower levels the boogie is class II and the ledges are fairly small but can be worth a look when the line isn’t obvious from above. At higher levels expect the boogie to move quickly and the ledges to be class IV in nature. After a little under 2¼ miles of this, start to keep an eye out for where the river curves to the left. The sound of the falls will likely be audible here, but keep on your toes, as blundering into them would not be good.