Boston Marathon logo
BOSTON MARATHON 2023

Adam Epstein

Bib: 30757•M

MA

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

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
26:45
Rank: #18277
Start → 5K
26:45 | 8:37/mi
10K· 6.21 mi
50:33
Rank: #15334 (+2943)
5K → 10K
23:48 | 7:40/mi
15K· 9.32 mi
1:14:28
Rank: #14277 (+1057)
10K → 15K
23:55 | 7:42/mi
20K· 12.43 mi
1:38:32
Rank: #13528 (+749)
15K → 20K
24:04 | 7:45/mi
Half· 13.11 mi
1:43:52
Rank: #13494 (+34)
20K → Half
5:20 | 7:49/mi
25K· 15.53 mi
2:02:43
Rank: #13034 (+460)
Half → 25K
18:51 | 7:46/mi
30K· 18.64 mi
2:26:57
Rank: #12333 (+701)
25K → 30K
24:14 | 7:48/mi
20M
2:37:37
Rank: #12048 (+285)
30K → 20M
10:40 | 7:51/mi
21M
2:45:36
Rank: #11733 (+315)
20M → 21M
7:59 | 7:59/mi
35K· 21.75 mi
2:51:12
Rank: #11600 (+133)
21M → 35K
5:36 | 7:29/mi
23M
3:00:45
Rank: #11284 (+316)
35K → 23M
9:33 | 7:38/mi
24M
3:08:02
Rank: #11021 (+263)
23M → 24M
7:17 | 7:17/mi
40K· 24.85 mi
3:14:23
Rank: #10798 (+223)
24M → 40K
6:21 | 7:26/mi
25.2M
3:17:04
Rank: #10684 (+114)
40K → 25.2M
2:41 | 7:47/mi
Finish· 26.22 mi
3:24:12
Rank: #10416 (+268)
25.2M → Finish
7:08 | 7:00/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 Half
Distance13.11 mi
Time1:43:52
Pace7:55 /mi
2nd Half✓ Faster
Distance13.11 mi
Time1:40:20
Pace7:39 /mi
📊Negative Split: 3.4% faster second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:47:4126:458:3726:45
8:37
-
10K
6.21 mi12:11:2950:338:0823:48
7:40
-0:57
15K
9.32 mi12:35:241:14:287:5923:55
7:42
+0:02
20K
12.43 mi12:59:281:38:327:5624:04
7:45
+0:03
Half
13.11 mi13:04:481:43:527:555:20
7:49
+0:04
25K
15.53 mi13:23:392:02:437:5418:51
7:46
-0:03
30K
18.64 mi13:47:532:26:577:5324:14
7:48
+0:02
20M
20.00 mi13:58:332:37:377:5310:40
7:51
+0:03
21M
21.00 mi14:06:322:45:367:537:59
7:59
+0:08
35K
21.75 mi14:12:082:51:127:525:36
7:29
-0:30
23M
23.00 mi14:21:413:00:457:529:33
7:38
+0:09
24M
24.00 mi14:28:583:08:027:507:17
7:17
-0:21
40K
24.85 mi14:35:193:14:237:496:21
7:26
+0:09
25.2M
25.20 mi14:38:003:17:047:492:41
7:47
+0:21
Finish
26.22 mi14:45:083:24:127:487:08
7:00
-0:47

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

7:00 /mi

Average Pace

7:48 /mi

Slowest Pace

8:37 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

26:22

13% of race

Time at Steady Pace

2:23:06

70% of race

Time at Slower Pace

34:44

17% of race

Average Pace: 7:47 /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 mi11:47:4126:458:3726:45
8:37
#18277
10K
6.21 mi12:11:2950:338:0823:48
7:40
#15334
15K
9.32 mi12:35:241:14:287:5923:55
7:42
#14277
20K
12.43 mi12:59:281:38:327:5624:04
7:45
#13528
Half
13.11 mi13:04:481:43:527:555:20
7:49
#13494
25K
15.53 mi13:23:392:02:437:5418:51
7:46
#13034
30K
18.64 mi13:47:532:26:577:5324:14
7:48
#12333
20M
20.00 mi13:58:332:37:377:5310:40
7:51
#12048
21M
21.00 mi14:06:322:45:367:537:59
7:59
#11733
35K
21.75 mi14:12:082:51:127:525:36
7:29
#11600
23M
23.00 mi14:21:413:00:457:529:33
7:38
#11284
24M
24.00 mi14:28:583:08:027:507:17
7:17
#11021
40K
24.85 mi14:35:193:14:237:496:21
7:26
#10798
25.2M
25.20 mi14:38:003:17:047:492:41
7:47
#10684
Finish
26.22 mi14:45:083:24:127:487:08
7:00
#10416
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi18277115291152911813(Top 44%)8993(Top 59%)8993(Top 170%)
10K6.21 mi3.10 mi15334+294310452+107710452+107711867(Top 45%)9056(Top 60%)9056(Top 171%)
15K9.32 mi3.11 mi14277+105710035+41710035+41711813(Top 44%)8993(Top 59%)8993(Top 170%)
20K12.43 mi3.11 mi13528+7499713+3229713+32211262(Top 42%)8695(Top 57%)8695(Top 165%)
Half13.11 mi0.68 mi13494+349698+159698+1512793(Top 48%)9386(Top 62%)9386(Top 178%)
25K15.53 mi2.42 mi13034+4609501+1979501+19710880(Top 41%)8440(Top 56%)8440(Top 160%)
30K18.64 mi3.11 mi12333+7019148+3539148+3539357(Top 35%)7484(Top 49%)7484(Top 142%)
20M20.00 mi1.36 mi12048+2858998+1508998+1509218(Top 35%)7322(Top 48%)7322(Top 139%)
21M21.00 mi1.00 mi11733+3158854+1448854+1447263(Top 27%)6041(Top 40%)6041(Top 114%)
35K21.75 mi0.75 mi11600+1338781+738781+738453(Top 32%)6784(Top 45%)6784(Top 128%)
23M23.00 mi1.25 mi11284+3168618+1638618+1637269(Top 27%)5996(Top 40%)5996(Top 113%)
24M24.00 mi1.00 mi11021+2638467+1518467+1516278(Top 24%)5275(Top 35%)5275(Top 100%)
40K24.85 mi0.85 mi10798+2238333+1348333+1346260(Top 24%)5195(Top 34%)5195(Top 98%)
25.2M25.20 mi0.35 mi10684+1148260+738260+735317(Top 20%)4497(Top 30%)4497(Top 85%)
Finish26.22 mi1.02 mi10416+2688098+1628098+1625225(Top 20%)4433(Top 29%)4433(Top 84%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 44%
×21stories
+97ft-345ft

Overall

11813

Males

8993

M18-39

8993

5K→10K

3.1 - 6.2 mi

Top 45%
×5stories
+79ft-138ft

Overall

11867

Males

9056

M18-39

9056

10K→15K

6.2 - 9.3 mi

Top 44%
×3stories
+67ft-78ft

Overall

11813

Males

8993

M18-39

8993

15K→20K

9.3 - 12.4 mi

Top 42%
×5stories
+106ft-86ft

Overall

11262

Males

8695

M18-39

8695

20K→Half

12.4 - 13.1 mi

Top 48%
×2stories
+19ft-37ft

Overall

12793

Males

9386

M18-39

9386

Half→25K

13.1 - 15.5 mi

Top 41%
×4stories
+66ft-88ft

Overall

10880

Males

8440

M18-39

8440

25K→30K

15.5 - 18.6 mi

Top 35%
×9stories
+181ft-148ft

Overall

9357

Males

7484

M18-39

7484

30K→20M

18.6 - 20.0 mi

Top 35%
×5stories
+64ft-50ft

Overall

9218

Males

7322

M18-39

7322

20M→21M

20.0 - 21.0 mi

Top 27%
×8stories
+106ft-24ft

Overall

7263

Males

6041

M18-39

6041

21M→35K

21.0 - 21.8 mi

Top 32%
×7stories
+17ft-86ft

Overall

8453

Males

6784

M18-39

6784

35K→23M

21.8 - 23.0 mi

Top 27%
×5stories
+23ft-63ft

Overall

7269

Males

5996

M18-39

5996

23M→24M

23.0 - 24.0 mi

Top 24%
×6stories
+12ft-82ft

Overall

6278

Males

5275

M18-39

5275

24M→40K

24.0 - 24.9 mi

Top 24%
×1story
+6ft-20ft

Overall

6260

Males

5195

M18-39

5195

40K→25.2M

24.9 - 25.2 mi

Top 20%
×1story
+13ft-16ft

Overall

5317

Males

4497

M18-39

4497

25.2M→Finish

25.2 - 26.2 mi

Top 20%
×2stories
+22ft-21ft

Overall

5225

Males

4433

M18-39

4433

Passing Analysis

Category:
Athletes Passed
7937
Passed By
76
Net Change
+7861
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#18277
5K → 10K29518+2943#18277#15334
10K → 15K10614+1057#15334#14277
15K → 20K7534+749#14277#13528
20K → Half5218+34#13528#13494
Half → 25K47111+460#13494#13034
25K → 30K7054+701#13034#12333
30K → 20M2872+285#12333#12048
20M → 21M3161+315#12048#11733
21M → 35K1396+133#11733#11600
35K → 23M3226+316#11600#11284
23M → 24M2685+263#11284#11021
24M → 40K2263+223#11021#10798
40K → 25.2M1151+114#10798#10684
25.2M → Finish2713+268#10684#10416
TOTALS793776+7861
📊

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