Help Center

General blupping schedule:
* train skill 2 + 3 to the max (in your case: stamina and jumping)
* do ALL the rides that give points in skill 2 + 3 (so in your example: forest rides, because they give no skill in trot)
* do comps that give points in skill 2 + 3 until you no longer get points in those skills AND have 20 wins
* after 20 wins: train skill 1 to the max and do ALL the other rides (in your case mountain, for the max skill points in trot)
* age to 10

After all this, the top 3 skills of your horse should be in bold letters on it's page and it has BLUP 100. Look in horse's Genetics tab and hover the BLUP meter: all 3 items should be maxed.

After that, if you like, you can of course train skill 4-5-6, do comps that give skillpoints in 4-5-6 and do all the beach rides to max out skill 1, but that is not necessary for 100 BLUP.
Beach rides DO count if you want better chances in the Grand Prix or to maybe win rozettes with your horse (if it's a really high skilled horse).