Boston Marathon logo
BOSTON MARATHON 2023

Michael Na

Bib: 18142•M

MD

0:00
0:00
/ mi
Masters
Be the first to cheer!
Overall
#0 / 26622
Gender (Male)
#0 / 15176
Masters (Masters Men)
#0 / 9891
Division (M55-59)
#0 / 1422
Top 46%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
25:19
Rank: #15058
Start → 5K
25:19 | 8:09/mi
10K· 6.21 mi
50:04
Rank: #14795 (+263)
5K → 10K
24:45 | 7:58/mi
15K· 9.32 mi
1:15:04
Rank: #14770 (+25)
10K → 15K
25:00 | 8:03/mi
20K· 12.43 mi
1:40:04
Rank: #14501 (+269)
15K → 20K
25:00 | 8:03/mi
Half· 13.11 mi
1:45:28
Rank: #14465 (+36)
20K → Half
5:24 | 7:55/mi
25K· 15.53 mi
2:05:45
Rank: #14609 (-144)
Half → 25K
20:17 | 8:22/mi
30K· 18.64 mi
2:31:52
Rank: #14428 (+181)
25K → 30K
26:07 | 8:24/mi
20M
2:43:30
Rank: #14375 (+53)
30K → 20M
11:38 | 8:34/mi
21M
2:52:12
Rank: #14214 (+161)
20M → 21M
8:42 | 8:42/mi
35K· 21.75 mi
2:58:03
Rank: #14062 (+152)
21M → 35K
5:51 | 7:49/mi
23M
3:08:23
Rank: #13886 (+176)
35K → 23M
10:20 | 8:15/mi
24M
3:16:33
Rank: #13798 (+88)
23M → 24M
8:10 | 8:10/mi
40K· 24.85 mi
3:23:44
Rank: #13745 (+53)
24M → 40K
7:11 | 8:24/mi
25.2M
3:26:49
Rank: #13712 (+33)
40K → 25.2M
3:05 | 8:56/mi
Finish· 26.22 mi
3:35:05
Rank: #13655 (+57)
25.2M → Finish
8:16 | 8:07/mi

The Course

Is this your race?

Claim it — unlock a deeper AI report on this race, free

A personalized Race Performance Report that goes beyond this page — emailed to you, built from your real splits.

Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:45:28
Pace8:03 /mi
2nd Half
Distance13.11 mi
Time1:49:37
Pace8:22 /mi
📊Positive Split: 3.9% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:16:1725:198:0925:19
8:09
-
10K
6.21 mi11:41:0250:048:0324:45
7:58
-0:11
15K
9.32 mi12:06:021:15:048:0325:00
8:03
+0:05
20K
12.43 mi12:31:021:40:048:0325:00
8:03
0:00
Half
13.11 mi12:36:261:45:288:035:24
7:55
-0:08
25K
15.53 mi12:56:432:05:458:0620:17
8:22
+0:27
30K
18.64 mi13:22:502:31:528:0926:07
8:24
+0:02
20M
20.00 mi13:34:282:43:308:1011:38
8:34
+0:10
21M
21.00 mi13:43:102:52:128:128:42
8:42
+0:08
35K
21.75 mi13:49:012:58:038:115:51
7:49
-0:53
23M
23.00 mi13:59:213:08:238:1110:20
8:15
+0:26
24M
24.00 mi14:07:313:16:338:118:10
8:10
-0:05
40K
24.85 mi14:14:423:23:448:127:11
8:24
+0:14
25.2M
25.20 mi14:17:473:26:498:123:05
8:56
+0:32
Finish
26.22 mi14:26:033:35:058:138:16
8:07
-0:49

Checkpoints & Pacing

📈Pace Line

Pace Progression

Track your pace changes throughout the race. Dot colors mark your quickest to easiest segments, relative to your own pace.

Fastest Pace

7:49 /mi

Average Pace

8:13 /mi

Slowest Pace

8:56 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:23:18

95% of race

Time at Steady Pace

11:47

5% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 8:12 /mi

Loading chart...
Faster pace (< avg)
Steady pace (≈ avg)
Slower pace (> avg)

🎨Heatmap

Pace Heatmap

Where you sped up and eased off relative to your own pace across the race. Colors are relative to your own range, not to other runners.

Loading...
0mi6.6mi13.1mi19.7mi26.2mi
Pace:
Faster
Steady
Slower

Click or hover over segments to see details

✨Sparklines

Checkpoint Splits with Pace Trends

Overall Pace Trend

CheckpointDistanceTime of DayTimeAvg PaceSegmentPaceTrendRank
5K
3.11 mi11:16:1725:198:0925:19
8:09
#15058
10K
6.21 mi11:41:0250:048:0324:45
7:58
#14795
15K
9.32 mi12:06:021:15:048:0325:00
8:03
#14770
20K
12.43 mi12:31:021:40:048:0325:00
8:03
#14501
Half
13.11 mi12:36:261:45:288:035:24
7:55
#14465
25K
15.53 mi12:56:432:05:458:0620:17
8:22
#14609
30K
18.64 mi13:22:502:31:528:0926:07
8:24
#14428
20M
20.00 mi13:34:282:43:308:1011:38
8:34
#14375
21M
21.00 mi13:43:102:52:128:128:42
8:42
#14214
35K
21.75 mi13:49:012:58:038:115:51
7:49
#14062
23M
23.00 mi13:59:213:08:238:1110:20
8:15
#13886
24M
24.00 mi14:07:313:16:338:118:10
8:10
#13798
40K
24.85 mi14:14:423:23:448:127:11
8:24
#13745
25.2M
25.20 mi14:17:473:26:498:123:05
8:56
#13712
Finish
26.22 mi14:26:033:35:058:138:16
8:07
#13655
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM55-59Seg. OverallSeg. MalesSeg. M55-59
5K3.11 mi3.11 mi15058103581035814763(Top 55%)10199(Top 67%)10199(Top 717%)
10K6.21 mi3.10 mi14795+26310254+10410254+10414526(Top 55%)10135(Top 67%)10135(Top 713%)
15K9.32 mi3.11 mi14770+2510230+2410230+2414763(Top 55%)10199(Top 67%)10199(Top 717%)
20K12.43 mi3.11 mi14501+26910112+11810112+11813794(Top 52%)9788(Top 64%)9788(Top 688%)
Half13.11 mi0.68 mi14465+3610091+2110091+2113639(Top 51%)9749(Top 64%)9749(Top 686%)
25K15.53 mi2.42 mi14609-14410118-2710118-2715343(Top 58%)10276(Top 68%)10276(Top 723%)
30K18.64 mi3.11 mi14428+1819999+1199999+11913725(Top 52%)9542(Top 63%)9542(Top 671%)
20M20.00 mi1.36 mi14375+539949+509949+5013978(Top 53%)9560(Top 63%)9560(Top 672%)
21M21.00 mi1.00 mi14214+1619876+739876+7311660(Top 44%)8427(Top 56%)8427(Top 593%)
35K21.75 mi0.75 mi14062+1529806+709806+7010797(Top 41%)8020(Top 53%)8020(Top 564%)
23M23.00 mi1.25 mi13886+1769713+939713+9311548(Top 43%)8263(Top 54%)8263(Top 581%)
24M24.00 mi1.00 mi13798+889644+699644+6912363(Top 46%)8574(Top 56%)8574(Top 603%)
40K24.85 mi0.85 mi13745+539618+269618+2612697(Top 48%)8632(Top 57%)8632(Top 607%)
25.2M25.20 mi0.35 mi13712+339597+219597+2112138(Top 46%)8332(Top 55%)8332(Top 586%)
Finish26.22 mi1.02 mi13655+579551+469551+4612839(Top 48%)8693(Top 57%)8693(Top 611%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 55%
×21stories
+97ft-345ft

Overall

14763

Males

10199

M55-59

10199

5K→10K

3.1 - 6.2 mi

Top 55%
×5stories
+79ft-138ft

Overall

14526

Males

10135

M55-59

10135

10K→15K

6.2 - 9.3 mi

Top 55%
×3stories
+67ft-78ft

Overall

14763

Males

10199

M55-59

10199

15K→20K

9.3 - 12.4 mi

Top 52%
×5stories
+106ft-86ft

Overall

13794

Males

9788

M55-59

9788

20K→Half

12.4 - 13.1 mi

Top 51%
×2stories
+19ft-37ft

Overall

13639

Males

9749

M55-59

9749

Half→25K

13.1 - 15.5 mi

Top 58%
×4stories
+66ft-88ft

Overall

15343

Males

10276

M55-59

10276

25K→30K

15.5 - 18.6 mi

Top 52%
×9stories
+181ft-148ft

Overall

13725

Males

9542

M55-59

9542

30K→20M

18.6 - 20.0 mi

Top 53%
×5stories
+64ft-50ft

Overall

13978

Males

9560

M55-59

9560

20M→21M

20.0 - 21.0 mi

Top 44%
×8stories
+106ft-24ft

Overall

11660

Males

8427

M55-59

8427

21M→35K

21.0 - 21.8 mi

Top 41%
×7stories
+17ft-86ft

Overall

10797

Males

8020

M55-59

8020

35K→23M

21.8 - 23.0 mi

Top 43%
×5stories
+23ft-63ft

Overall

11548

Males

8263

M55-59

8263

23M→24M

23.0 - 24.0 mi

Top 46%
×6stories
+12ft-82ft

Overall

12363

Males

8574

M55-59

8574

24M→40K

24.0 - 24.9 mi

Top 48%
×1story
+6ft-20ft

Overall

12697

Males

8632

M55-59

8632

40K→25.2M

24.9 - 25.2 mi

Top 46%
×1story
+13ft-16ft

Overall

12138

Males

8332

M55-59

8332

25.2M→Finish

25.2 - 26.2 mi

Top 48%
×2stories
+22ft-21ft

Overall

12839

Males

8693

M55-59

8693

Passing Analysis

Category:
Athletes Passed
2391
Passed By
988
Net Change
+1403
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#15058
5K → 10K443180+263#15058#14795
10K → 15K197172+25#14795#14770
15K → 20K34576+269#14770#14501
20K → Half5317+36#14501#14465
Half → 25K109253-144#14465#14609
25K → 30K26281+181#14609#14428
30K → 20M11057+53#14428#14375
20M → 21M1709+161#14375#14214
21M → 35K1586+152#14214#14062
35K → 23M18812+176#14062#13886
23M → 24M11628+88#13886#13798
24M → 40K8532+53#13798#13745
40K → 25.2M5118+33#13745#13712
25.2M → Finish10447+57#13712#13655
TOTALS2391988+1403
📊

Passing Visuals

Category:
Loading...

🔥Passing Intensity

Loading...

🔄Passing Circle

Loading...

🌊Position Flow

Loading...

🏃Race Lanes

Loading...

Upload your GPX file

Supports Garmin, Apple Watch, Polar, Suunto, COROS, Strava, and other apps

.gpx files up to 10MB

Export Track Data

Download your race performance as a GPX or TCX file to import into Strava, Garmin Connect, or other fitness apps.

Questions or issues regarding timing data?

If you notice any discrepancies in your timing data or have questions about your results, our support team can help.

Contact Race Support
Share Feedback

Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing