Pros:
Pleasant park-style recreational course featuring well-mown grass and good level baskets. This course is a quick, enjoyable spin with ample ace run opportunities.
Scattered trees in key locations require some shot shaping and provide welcome shade on sunny days. A few baskets are set near (presumably OB) park roads, requiring some control on drives or long putts.
Sturdy footbridges to cross drainage ditches where needed. Each hole has a tee sign with map (but see cons).
Cons:
Safety hazards are present on several holes. The basket for Hole 1 is directly behind a pavilion with picnic tables. Holes 3 (360') and 4 (140') have a moderately busy road all along the right side of the fairway. Hitting an oncoming car is quite possible if you don't wait for a break in traffic before throwing.
Course is mostly flat and relatively open.
Grass teepads.
Chance of disc loss on Hole 7, where throwing long right can find thick rough.
Some tee signs were weather-damaged and hard to read, but holes are short enough that this was not a practical problem.
Other Thoughts:
The park was named after Richard "Beaver Dick" Leigh, a legendary mountain man, explorer, and fur trapper. Sources differ on whether his nickname derived from his trapping prowess or his buckteeth.
Six of the nine holes ranging from 140' to 245' are listed as par 2. The three longer holes range from 270' to 360' and are listed as par 3. If you care about such things, scoring below course par will be reasonably challenging even for experienced players.
Fairly low chance of disc loss except for Hole 7 (see cons). Nice picnic pavilions in the park and recreational activities in the river next to the course.
No practice basket, benches, etc. Just a nice little rec park that would benefit from eliminating a few glaring safety hazards.
Beaver Dick Park and nearby Rexburg Nature Park are both quick 9-hole spings, making a short, pleasant detour from I-15 if you are north of Idaho Falls.
Overall I felt that Beaver Dick Park started out a little soft, but holes tightened up and the round built to a reasonably satisfying climax. The course is well trimmed but some may find the lack of length unsatisfying.