From the title page: An Introductory Blackmoor Adventure for 4-6 Characters of 2nd-4th Level
From the introduction:
The Redwood Scar is an adventure for Dave Arneson’s Blackmoor designed for four to six player characters (PCs) of 2nd through 4th level. The action takes place in the Redwoods and involves the PCs stopping an insidious evil from perverting the forest. While the characters can be of any race and class, a druid, ranger and/or a Cumasti elf are particularly appropriate. See the "Scaling Information" section to tailor this adventure for larger or smaller groups and/or those of higher or lower level. Boxed text should be paraphrased or read aloud to the players.