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We measure the photometric properties of 105 giant arcs that were identifiedin systematic searches for galaxy-cluster-scale strong lenses in the SecondRed-Sequence Cluster Survey (RCS-2) and the Sloan Digital Sky Survey (SDSS).The cluster lenses span 0.2 < z_lens < 1.2 in redshift, with a median z_lens =0.58. Using broadband color criteria we sort the entire arc sample intoredshift bins based on u-g and g-r colors, and also r-z colors for the ~90% ofarcs that have z-band data. This analysis yields broad redshift constraintswith 71 +5 -4 % of the arcs at z > 1.0, 64 +6 -4 % at z > 1.4, 56 +5 -4 % at z> 1.9, and 21 +4 -2 % at z > 2.7. The remaining 29 +3 -5 % have z < 1. Theinferred median redshift is z_s = 2.0 +/- 0.1, in good agreement with aprevious determination from a smaller sample of brighter arcs (g < 22.5). Thisagreement confirms that z_s = 2.0 +/- 0.1 is the typical redshift for giantarcs with g < 24 that are produced by cluster-scale strong lenses, and thatthere is no evidence for strong evolution in the redshift distribution of arcsover a wide range of g-band magnitudes (20 < g < 24). Establishing that half ofall giant arcs are at z > 2 contributes significantly toward relieving thetension between the number of arcs observed and the number expected in aLambda-CDM cosmology, but there is considerable evidence to suggest that adiscrepancy persists. Additionally, this work confirms that forthcoming largesamples of giant arcs will supply the observational community with manymagnified galaxies at z > 2.

Broadband Photometry of 105 Giant Arcs: Redshift Constraints and Implications for Giant Arc Statistics