About 30,000 participants will leave the starting line in Monday’s Boston Marathon. They’ll range in experience from Corey Brock to Jim Musante.

The two area runners live just across the water from each other in New Smyrna Beach’s Lake Waterford Estates, but the widest of gulfs separate their Boston Marathon experience.

While Brock is making her first attempt, Musante is approaching his 39th. And not just his 39th, but his 39th consecutive Boston start, which is the 10th longest current streak (Bennett Beach of Maryland is the current benchmark at 52 straight).

At a healthy and still-fast 61, Musante definitely feels 50 straight Boston Marathons is within reach. But even beyond that, he’s not making any exit plans.

“My goal is to run until I die on the course,” says Musante, who long ago joined Boston’s Quarter Century Club for completing 25 Boston Marathons. “Our club’s somewhat loose thinking is, when the ambulance picks us up, it has to cross the finish line on the way to the morgue so we get that one last recorded finish.”

Meanwhile, Musante’s neighbor can’t think beyond Monday’s start to the 26.2-mile grind.

“I’m nervous,” says Brock, a 39-year-old mother whose husband Tanner and four children, ranging in age from 6-12, will be watching from the sidelines. “The crowds, the amount of people … getting on the bus to go to the start line … it all seems so confusing.

“Nervous. Anxious, I guess. But I’m also excited.”

Teacher in training

Growing up in New Orleans, Corey Brock never ran. But her younger sister, Katie, did, well enough to earn a cross-country scholarship to Mississippi State University, where Corey also went to college. Her father ran, too, and quite seriously. She recalls him running a couple of New Orleans Marathons.

So while Brock may have had the bloodlines, it was the waistline that fueled her initial motivation. She was 19 and about to begin her sophomore year in college.

“I remember I’d gained my ‘freshman 15 (pounds),’ ” she says. “So I went out and ran a half-mile. I thought I was gonna die. But I’ve literally never stopped running since then.”

Progress came quickly, and just a few years after she started running, Brock completed a marathon in New Orleans, turning in a time of three hours, 56 minutes. That was that, she thought, and she returned to running much shorter distances, including a lot of 5Ks when she moved to New Smyrna Beach in 2005.

“My goal was to break a 20-minute 5K, and I did that about eight years ago,” she says. “After that, I just started running for fun.”

But along the way she met a new NSB resident, Amanda McMeniman, who was looking for a running partner. They worked their way up to running a local half-marathon, then Amanda convinced Corey to train for the 2018 Tomoka Marathon in Ormond Beach, where they could potentially post a qualifying time for the 2019 Boston Marathon.

Brock needed to run a 3:40 to qualify; she ran a 3:25. McMeninam also qualified and will be running Monday as well.

Brock isn’t just a mother of two boys and two girls, but teaches language arts at Sacred Heart Middle School. She has to make certain sacrifices to train the way she prefers. She’s part of a group that runs five miles in the predawn of Tuesday and Thursday mornings.

On Wednesdays and Fridays, she does the bike trainer in her garage for an hour, starting at 5 a.m.

And she swims about 2,500 yards every Monday and Wednesday afternoon at the Port Orange YMCA while her girls are at swim practice.

And then there’s a longer-distance run on Saturdays — she got up to 20 miles in March and has been backing down from that before increasing the mileage dramatically in Boston.

“I don’t like missing a workout,” says the 5-foot-2 dynamo. “I feel bad if I miss. But sometimes I feel like my body needs a break.”

She’ll get a deserved break following Monday’s marathon. Well, right up until she scratches her triathlon itch less than a month later, on May 11.

“I’m doing a half-Ironman on my birthday,” she says.

All about adrenaline

Jim Musante talks about the Boston Marathon the way golfers talk about the Masters, the way baseball romantics talk about Fenway Park, the way Keith Jackson talked about Michigan vs. Ohio State.

When the first and slightest hint of winter’s end — or what passes for winter in these parts — arrives with the early-morning chirping of birds, he gets the feeling and his training regimen heats up. That’s a good thing. But he builds so much anticipation and desire and flat-out passion, it becomes a bad thing.

“I could never get within 7 minutes of my qualifying time at Boston,” says Musante, a former elite runner whose best-ever Boston time was 2:37 in the late-1980s.

The hurdle: It's tough to match the adrenaline rush he'll feel on Monday. Especially at one of the marquee sections of the famous course. They call it the Scream Tunnel, a quarter-mile stretch just beyond the midway point, in front of Wellesley College, the all-women's school.

“You go by Wellesley College, you have 10,000 girls throwing rose pedals at you, screaming, offering kisses,” he says with a huge smile. “You’re halfway through the race at that point, your chest is out … ‘Look at me, girls!’ That gets to me. I run on adrenaline.”

His main piece of advice for Brock, the Boston rookie, involves that fight against adrenaline, but more on that later.

Musante, who retired two years ago from the restaurant business, isn’t necessarily the best-known local runner under his own roof. Wife Kitty dominated the local scene for many years and ran 11 Boston Marathons herself. Her marathon career ended two years ago in Boston when she ran on an injured foot and subsequently took a year off from running.

She has since returned to a more modest level of competition and is dominating again locally, though now limiting her dominance to the 60-64 age group in 5K events. She’s in Boston with Jim and competes in the Boston Athletic Association’s 5K on Saturday.

“I can’t increase my daily miles due to too many nagging injuries,” Kitty says, “so I’ll stick to 5Ks so I can continue to run every day.”

'Bring it on'

Brock’s goal Monday is fundamental. In order to automatically qualify for the 2020 Boston Marathon, she needs to run this year’s event at or below three hours and 40 minutes.

“I want to do that because there are a lot of people going up next year for Jim’s 40th,” she says of her neighbor’s 2020 milestone.

That neighbor is thinking bigger than mere qualification, largely because he’s had a surge of recent speed that has him feeling his oats. His springtime training included a 24-mile run and a couple of 20-milers. Great times, too, he says.

But he knows he has to properly navigate the Scream Tunnel at Wellesley and, a few miles later, the infamous Heartbreak Hill near Boston College. To prepare, he spends the weeks before Boston mimicking the challenge in the only manner afforded him in Southeast Volusia: The tall bridge on New Smyrna Beach’s South Causeway.

Back and forth, back and forth, back and forth. After long runs beachside, he’ll finish at the bridge and do a handful of bridge-repeats to get himself ready.

But once a week, it’s all bridge.

“When I start my season, I can do three or four of them comfortably,” he said a couple weeks before leaving for Boston. “Now, I can do 20 of them. Bring it on. I feel great going up, better coming down.”

Those bridge-repeats are something he stressed to Brock, who will face the types of elevation changes you just don't find in Southeast Volusia. Musante said he's seen her at the South Causeway bridge, "and that bodes well," he says.

Musante has also warned Brock to guard against her adrenaline in the early miles, though she admits it will be tough to avoid going too fast too early — "I can see myself doing that, especially with all the people around," she says.

If you control yourself early, Musante insists, you'll be rewarded late.

"Most don't listen, and there are far more crash-and-burns than success stories," Musante says. "Go slow in the beginning, the first 10 miles, even slower than you think you're already going. The crowds will make you feel stronger than you are.

"If you're at 75-percent at the top of Heartbreak Hill (about Mile 21) and you can see the John Hancock Building in downtown, you can go for it and start to push. You will pass hundreds, if not thousands, in those last five miles."

Some have listened to those words of experience, but many haven't. Musante hopes and suspects his neighbor will heed the advice.

"My gut is, Corey might do good," he says. "She's been very steady up to now. And women generally listen better than the men."