The tsunami generated by the 29 July (30 July locally) Mw 8.8 Kamchatka-Kuril earthquake produced significant runup in both the far- and nearfield. Along the southeastern coast of Kamchatka and North Kuril Islands, for a distance of at least 550 km proximal to the rupture, runups reached at least 2–3 m, typically 5–10 m, with maximum runups of 10–16 m over a 100-km stretch of Kamchatka (centered on Vestnik Bay) and also on Paramushir Island. Via a range of methods, we tabulated more than 550 runup (vertical) and inundation (horizontal) tsunami measurements from Shipunsky Peninsula on Kamchatka to Mussel Bay on Onekotan Island. We employed several means of tsunami measurement. The most comprehensive data are from post-tsunami aerial photography along the coast via helicopter, with subsequent application of 2-m Arctic DEM to determine elevations. Instrumental tsunami measurements were made on the islands of Paramushir, Shumshu, Atlasova and Onekotan. Expeditionary studies of the tsunami's effects were also conducted on the coast of Avachinsky Bay near Petropavlovsk-Kamchatsky. Continuous lines of maximum inundation were mapped for many coastal areas based on the aerial survey data. Additional points of runup and inundation can be generated from these lines. Long inundation distances for the 2025 tsunami are usually in cases of tsunami penetration up low river valleys. There are several examples of high tsunami runup up steep coastal slopes and narrow stream valleys, typically 15–18 m with an outlier of 33 m. In cases where that runup was unusually high (relative to other nearby elevations), we label the elevation the tsunami reached “splash” and interpret these as small-scale features representing complex, often high frequency, dynamics of the tsunami that scientists may not always be able to numerically recreate using the data to compare to models.