Several small hard coral finger reefs come right to shore in this area. In the summer, water is calm and clear (50 ft). Easy entries from sandy beaches. Huge schools of fish, plus sea lions. Current can be very strong if you get too far from shore.
From Los Cabos International Airport (San Jose del Cabo), Mexico: Head north for 71 km (44 mil.) on Mex Hwy 1 - going through the small towns Miraflores and Santiago. Just past hwy marker 92km will be a junction at Las Cuvaso to La Ribera and Cabo Pulmo (jst before a gigantic wash with a bridge spanning it). Turn right here. Drive 8 km (5 mi.), passing the small town of Santa Cruz. At the out skirts of the town of La Ribera, turn right again and head towards Punta Colorada and Cabo Pulmo. Continue straight (about 26 km [16 mi.]) on this paved road as it bends south a mile inland. Continue past Punta Colorada for about 5-10 minutes. At this point the road turns into a washboard dirt road. You will pass through two small towns, El Rincon and Las Barracas. Approaching Cabo Pulmo, you will descend down a large steep hill with a beautiful vista of the bay. Note that Cabo Pulmo has no street names. Once in Cabo Pulmo, your first landmark will be Titos Bar (a small palapa - thatched roof structure) on the right. Continue driving through town for a few miles and turn left at the sign for Playa Los Arbolitos. Drive down to the beach (the road is very rough but drivable with a regular rental car). There is ample parking. Playa Los Arbolitos has excellent snorkeling but limited diving. To reach a better area, hike the coastal trail that starts to the right (as you face the water) for about a mile to Playa La Sirenita.