Watch the gauge on the Racecourse. The Rio Grande often rises a few hundred cfs in October (usually earlier than this though), so it wouldn't surprise me of the Racecourse got up to 500-1000 cfs over the next few days.  Get out and paddle, if you can. It's like paddling a different river with every increase of 100cfs.

Upper Rio Grand; Upper Box
http://waterdata.usgs.gov/nwis/uv?08263500

State Park
http://waterdata.usgs.gov/nwis/uv?08276500

Notice the lag between the two.

If the Racecourse is still a bit intimidating, the State Park is runable again above 450cfs.  The State Park doesn't change too much with increases in flow. It's still almost always class I, with Gauging Station a Class II...very predictable.

Happy paddling!
Kelly