drrick: "So, are there any BWCA lakes where you can keep a Pike 24 to 36 inches long ?"
Yes, many. See the first response. You may keep two pike. Anything up to 29 is legal. 30-40 is entirely catch and release. One of your two keepers may be 40+.
This is the general regulation for the NE zone. Rules for spearing can be different, as well as border lakes and lakes with special management in effect. Always check the DNR site for specifics.