I cannot write this guide as requested because the search results contain conflicting information about Lance's Left's location that makes it impossible to provide accurate content for "Lance's Left in Puerto Rico."

The search results consistently identify Lance's Left as being located in two different places:

1. The Mentawai Islands, Indonesia (off the west coast of Sumatra) - mentioned in sources covering the Indonesian location with details about Sipora Island, Padang airport access, and Indonesian geography.

2. Nicaragua's Pacific coast - mentioned in sources describing Nicaraguan access points like Playa Gigante, Playa Colorado, and Lake Nicaragua's geography.

Neither search result mentions Puerto Rico at all. The user has provided "existing data" claiming Lance's Left is a rivermouth break in Puerto Rico with specific characteristics, but this contradicts all available search information.

I cannot ethically write a comprehensive guide to a surf spot in Puerto Rico when:

1. No search results support Lance's Left existing in Puerto Rico
2. The provided "existing data" conflicts with established information about this spot's actual locations
3. Creating fictional content about a real surf spot's location would mislead travelers and damage credibility

To provide you with an accurate guide, I would need either:

1. Clarification on which Lance's Left location you want covered (Mentawai Islands, Indonesia or Nicaragua)
2. Search results specifically about a Lance's Left in Puerto Rico
3. Confirmation that the Puerto Rico location and characteristics are correct

I'm happy to write a comprehensive, SEO-optimized guide for Lance's Left in either the Mentawai Islands or Nicaragua using the search results provided, or to help with a different Puerto Rico surf spot if that's your actual destination.

I cannot write this guide as requested because the search results contain conflicting information about Lance's Left's location that makes it impossible to provide accurate content for "Lance's Left in Puerto Rico."

The search results consistently identify Lance's Left as being located in two different places:

1. The Mentawai Islands, Indonesia (off the west coast of Sumatra) - mentioned in sources covering the Indonesian location with details about Sipora Island, Padang airport access, and Indonesian geography.

2. Nicaragua's Pacific coast - mentioned in sources describing Nicaraguan access points like Playa Gigante, Playa Colorado, and Lake Nicaragua's geography.

Neither search result mentions Puerto Rico at all. The user has provided "existing data" claiming Lance's Left is a rivermouth break in Puerto Rico with specific characteristics, but this contradicts all available search information.

I cannot ethically write a comprehensive guide to a surf spot in Puerto Rico when:

1. No search results support Lance's Left existing in Puerto Rico
2. The provided "existing data" conflicts with established information about this spot's actual locations
3. Creating fictional content about a real surf spot's location would mislead travelers and damage credibility

To provide you with an accurate guide, I would need either:

1. Clarification on which Lance's Left location you want covered (Mentawai Islands, Indonesia or Nicaragua)
2. Search results specifically about a Lance's Left in Puerto Rico
3. Confirmation that the Puerto Rico location and characteristics are correct

I'm happy to write a comprehensive, SEO-optimized guide for Lance's Left in either the Mentawai Islands or Nicaragua using the search results provided, or to help with a different Puerto Rico surf spot if that's your actual destination.