Beavers is a fun small wave to hit when RRP is just missing the enough water flows. Most people are surfing Beavers with a longboard or something with a good amount of volume. The wave comes in best at about 120cfs but can be surfed much lower than that. Unfortunately the wave blows out when it gets to 400cfs but you will likely be at RRP surfing if the flow is that high.
NOTE, the 2021 and likely 2022 surf seasons access to Beaver's is via wading into the river and paddling up from the fence line to the river to the wave just up from the parking lot.... Be cautious using the bike path, it is closed for emergency construction repairs to the failed retaining wall on the bike path (does not impact the river). Also, beware of dangerous rocks behind the wave, and new rock directly under the wave on surfers left. For more info on Beavers Wave check http://endlesswaves.net/waves/beaver-wave/