Boston Marathon logo
BOSTON MARATHON 2023

David Schwartz

Bib: 322•M

CA

0:00
0:00
/ mi
Be the first to cheer!
Overall
#0 / 26622
Top 0.8%
Gender (Male)
#0 / 15176
Top 1%
Division (M18-39)
#0 / 5285
Top 3%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
17:15
Rank: #149
Start → 5K
17:15 | 5:33/mi
10K· 6.21 mi
35:04
Rank: #232 (-83)
5K → 10K
17:49 | 5:44/mi
15K· 9.32 mi
52:58
Rank: #260 (-28)
10K → 15K
17:54 | 5:46/mi
20K· 12.43 mi
1:10:46
Rank: #247 (+13)
15K → 20K
17:48 | 5:44/mi
Half· 13.11 mi
1:14:36
Rank: #248 (-1)
20K → Half
3:50 | 5:37/mi
25K· 15.53 mi
1:28:26
Rank: #230 (+18)
Half → 25K
13:50 | 5:42/mi
30K· 18.64 mi
1:46:40
Rank: #211 (+19)
25K → 30K
18:14 | 5:52/mi
20M
1:54:46
Rank: #214 (-3)
30K → 20M
8:06 | 5:58/mi
21M
2:01:10
Rank: #225 (-11)
20M → 21M
6:24 | 6:24/mi
35K· 21.75 mi
2:05:26
Rank: #222 (+3)
21M → 35K
4:16 | 5:42/mi
23M
2:13:03
Rank: #226 (-4)
35K → 23M
7:37 | 6:05/mi
24M
2:18:57
Rank: #225 (+1)
23M → 24M
5:54 | 5:54/mi
40K· 24.85 mi
2:24:10
Rank: #222 (+3)
24M → 40K
5:13 | 6:06/mi
25.2M
2:26:26
Rank: #222
40K → 25.2M
2:16 | 6:34/mi
Finish· 26.22 mi
2:32:28
Rank: #224 (-2)
25.2M → Finish
6:02 | 5:55/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
Time1:14:36
Pace5:41 /mi
2nd Half
Distance13.11 mi
Time1:17:52
Pace5:56 /mi
📊Positive Split: 4.4% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:17:1717:155:3317:15
5:33
-
10K
6.21 mi10:35:0635:045:3917:49
5:44
+0:11
15K
9.32 mi10:53:0052:585:4117:54
5:46
+0:02
20K
12.43 mi11:10:481:10:465:4217:48
5:44
-0:02
Half
13.11 mi11:14:381:14:365:413:50
5:37
-0:07
25K
15.53 mi11:28:281:28:265:4213:50
5:42
+0:05
30K
18.64 mi11:46:421:46:405:4318:14
5:52
+0:10
20M
20.00 mi11:54:481:54:465:448:06
5:58
+0:06
21M
21.00 mi12:01:122:01:105:466:24
6:24
+0:26
35K
21.75 mi12:05:282:05:265:464:16
5:42
-0:42
23M
23.00 mi12:13:052:13:035:477:37
6:05
+0:23
24M
24.00 mi12:18:592:18:575:475:54
5:54
-0:11
40K
24.85 mi12:24:122:24:105:485:13
6:06
+0:12
25.2M
25.20 mi12:26:282:26:265:492:16
6:34
+0:28
Finish
26.22 mi12:32:302:32:285:496:02
5:55
-0:39

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

5:33 /mi

Average Pace

5:49 /mi

Slowest Pace

6:34 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:23:48

94% of race

Time at Steady Pace

6:24

4% of race

Time at Slower Pace

2:16

1% of race

Average Pace: 5:49 /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 mi10:17:1717:155:3317:15
5:33
#149
10K
6.21 mi10:35:0635:045:3917:49
5:44
#232
15K
9.32 mi10:53:0052:585:4117:54
5:46
#260
20K
12.43 mi11:10:481:10:465:4217:48
5:44
#247
Half
13.11 mi11:14:381:14:365:413:50
5:37
#248
25K
15.53 mi11:28:281:28:265:4213:50
5:42
#230
30K
18.64 mi11:46:421:46:405:4318:14
5:52
#211
20M
20.00 mi11:54:481:54:465:448:06
5:58
#214
21M
21.00 mi12:01:122:01:105:466:24
6:24
#225
35K
21.75 mi12:05:282:05:265:464:16
5:42
#222
23M
23.00 mi12:13:052:13:035:477:37
6:05
#226
24M
24.00 mi12:18:592:18:575:475:54
5:54
#225
40K
24.85 mi12:24:122:24:105:485:13
6:06
#222
25.2M
25.20 mi12:26:282:26:265:492:16
6:34
#222
Finish
26.22 mi12:32:302:32:285:496:02
5:55
#224
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi149149149332(Top 1%)299(Top 2%)299(Top 6%)
10K6.21 mi3.10 mi232-83205-56205-56350(Top 1%)315(Top 2%)315(Top 6%)
15K9.32 mi3.11 mi260-28232-27232-27332(Top 1%)299(Top 2%)299(Top 6%)
20K12.43 mi3.11 mi247+13220+12220+12222(Top 0.8%)197(Top 1%)197(Top 4%)
Half13.11 mi0.68 mi248-1220220206(Top 0.8%)184(Top 1%)184(Top 3%)
25K15.53 mi2.42 mi230+18203+17203+17177(Top 0.7%)155(Top 1%)155(Top 3%)
30K18.64 mi3.11 mi211+19187+16187+16211(Top 0.8%)188(Top 1%)188(Top 4%)
20M20.00 mi1.36 mi214-3190-3190-3299(Top 1%)274(Top 2%)274(Top 5%)
21M21.00 mi1.00 mi225-11200-10200-10471(Top 2%)437(Top 3%)437(Top 8%)
35K21.75 mi0.75 mi222+3197+3197+3226(Top 0.8%)203(Top 1%)203(Top 4%)
23M23.00 mi1.25 mi226-4201-4201-4416(Top 2%)388(Top 3%)388(Top 7%)
24M24.00 mi1.00 mi225+1200+1200+1380(Top 1%)354(Top 2%)354(Top 7%)
40K24.85 mi0.85 mi222+3197+3197+3472(Top 2%)443(Top 3%)443(Top 8%)
25.2M25.20 mi0.35 mi222197197582(Top 2%)549(Top 4%)549(Top 10%)
Finish26.22 mi1.02 mi224-2199-2199-2556(Top 2%)527(Top 3%)527(Top 10%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 1%
×21stories
+97ft-345ft

Overall

332

Males

299

M18-39

299

5K→10K

3.1 - 6.2 mi

Top 1%
×5stories
+79ft-138ft

Overall

350

Males

315

M18-39

315

10K→15K

6.2 - 9.3 mi

Top 1%
×3stories
+67ft-78ft

Overall

332

Males

299

M18-39

299

15K→20K

9.3 - 12.4 mi

Top 0.8%
×5stories
+106ft-86ft

Overall

222

Males

197

M18-39

197

20K→Half

12.4 - 13.1 mi

Top 0.8%
×2stories
+19ft-37ft

Overall

206

Males

184

M18-39

184

Half→25K

13.1 - 15.5 mi

Top 0.7%
×4stories
+66ft-88ft

Overall

177

Males

155

M18-39

155

25K→30K

15.5 - 18.6 mi

Top 0.8%
×9stories
+181ft-148ft

Overall

211

Males

188

M18-39

188

30K→20M

18.6 - 20.0 mi

Top 1%
×5stories
+64ft-50ft

Overall

299

Males

274

M18-39

274

20M→21M

20.0 - 21.0 mi

Top 2%
×8stories
+106ft-24ft

Overall

471

Males

437

M18-39

437

21M→35K

21.0 - 21.8 mi

Top 0.8%
×7stories
+17ft-86ft

Overall

226

Males

203

M18-39

203

35K→23M

21.8 - 23.0 mi

Top 2%
×5stories
+23ft-63ft

Overall

416

Males

388

M18-39

388

23M→24M

23.0 - 24.0 mi

Top 1%
×6stories
+12ft-82ft

Overall

380

Males

354

M18-39

354

24M→40K

24.0 - 24.9 mi

Top 2%
×1story
+6ft-20ft

Overall

472

Males

443

M18-39

443

40K→25.2M

24.9 - 25.2 mi

Top 2%
×1story
+13ft-16ft

Overall

582

Males

549

M18-39

549

25.2M→Finish

25.2 - 26.2 mi

Top 2%
×2stories
+22ft-21ft

Overall

556

Males

527

M18-39

527

Passing Analysis

Category:
Athletes Passed
94
Passed By
169
Net Change
-75
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#149
5K → 10K083-83#149#232
10K → 15K230-28#232#260
15K → 20K163+13#260#247
20K → Half12-1#247#248
Half → 25K202+18#248#230
25K → 30K201+19#230#211
30K → 20M710-3#211#214
20M → 21M314-11#214#225
21M → 35K63+3#225#222
35K → 23M610-4#222#226
23M → 24M10+1#226#225
24M → 40K85+3#225#222
40K → 25.2M110#222#222
25.2M → Finish35-2#222#224
TOTALS94169-75
📊

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