Cook Political Report has this chart of all states and territories, giving the date of Republican caucuses and primaries in time order. The chart also shows which voters may participate. The Cook Report uses the term “mixed” to describe places in which independents can choose a Republican presidential primary.

The Cook chart is incorrect for Arizona. The Arizona Republican primary is closed, but the Cook Report says it is open. Also the Cook chart says Ohio is mixed, but it is open.

Finally, the chart shows how many delegates each state sends to the Republican convention. Thanks to Political Wire for the link.