Boston Marathon logo
BOSTON MARATHON 2023

James Smadbeck

Bib: 7082•M

MA

0:00
0:00
/ mi
Be the first to cheer!
Overall
#0 / 26622
Top 18%
Gender (Male)
#0 / 15176
Top 30%
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
21:27
Rank: #5587
Start → 5K
21:27 | 6:54/mi
10K· 6.21 mi
42:50
Rank: #5760 (-173)
5K → 10K
21:23 | 6:53/mi
15K· 9.32 mi
1:04:15
Rank: #5796 (-36)
10K → 15K
21:25 | 6:54/mi
20K· 12.43 mi
1:25:49
Rank: #5735 (+61)
15K → 20K
21:34 | 6:56/mi
Half· 13.11 mi
1:30:33
Rank: #5758 (-23)
20K → Half
4:44 | 6:56/mi
25K· 15.53 mi
1:47:17
Rank: #5623 (+135)
Half → 25K
16:44 | 6:54/mi
30K· 18.64 mi
2:09:12
Rank: #5414 (+209)
25K → 30K
21:55 | 7:03/mi
20M
2:18:48
Rank: #5288 (+126)
30K → 20M
9:36 | 7:04/mi
21M
2:26:07
Rank: #5144 (+144)
20M → 21M
7:19 | 7:19/mi
35K· 21.75 mi
2:31:21
Rank: #5126 (+18)
21M → 35K
5:14 | 7:00/mi
23M
2:40:15
Rank: #5035 (+91)
35K → 23M
8:54 | 7:06/mi
24M
2:47:22
Rank: #5004 (+31)
23M → 24M
7:07 | 7:07/mi
40K· 24.85 mi
2:53:28
Rank: #4955 (+49)
24M → 40K
6:06 | 7:08/mi
25.2M
2:56:08
Rank: #4940 (+15)
40K → 25.2M
2:40 | 7:44/mi
Finish· 26.22 mi
3:03:13
Rank: #4883 (+57)
25.2M → Finish
7:05 | 6:57/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
Time1:30:33
Pace6:54 /mi
2nd Half
Distance13.11 mi
Time1:32:40
Pace7:04 /mi
📊Positive Split: 2.3% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:37:0721:276:5421:27
6:54
-
10K
6.21 mi11:58:3042:506:5421:23
6:53
-0:01
15K
9.32 mi12:19:551:04:156:5421:25
6:54
+0:01
20K
12.43 mi12:41:291:25:496:5421:34
6:56
+0:02
Half
13.11 mi12:46:131:30:336:544:44
6:56
0:00
25K
15.53 mi13:02:571:47:176:5416:44
6:54
-0:02
30K
18.64 mi13:24:522:09:126:5621:55
7:03
+0:09
20M
20.00 mi13:34:282:18:486:569:36
7:04
+0:01
21M
21.00 mi13:41:472:26:076:577:19
7:19
+0:15
35K
21.75 mi13:47:012:31:216:585:14
7:00
-0:19
23M
23.00 mi13:55:552:40:156:588:54
7:06
+0:06
24M
24.00 mi14:03:022:47:226:587:07
7:07
+0:01
40K
24.85 mi14:09:082:53:286:596:06
7:08
+0:01
25.2M
25.20 mi14:11:482:56:086:592:40
7:44
+0:36
Finish
26.22 mi14:18:533:03:137:007:05
6:57
-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

6:53 /mi

Average Pace

7:00 /mi

Slowest Pace

7:44 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:00:33

99% of race

Time at Steady Pace

2:40

1% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 6:59 /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 mi11:37:0721:276:5421:27
6:54
#5587
10K
6.21 mi11:58:3042:506:5421:23
6:53
#5760
15K
9.32 mi12:19:551:04:156:5421:25
6:54
#5796
20K
12.43 mi12:41:291:25:496:5421:34
6:56
#5735
Half
13.11 mi12:46:131:30:336:544:44
6:56
#5758
25K
15.53 mi13:02:571:47:176:5416:44
6:54
#5623
30K
18.64 mi13:24:522:09:126:5621:55
7:03
#5414
20M
20.00 mi13:34:282:18:486:569:36
7:04
#5288
21M
21.00 mi13:41:472:26:076:577:19
7:19
#5144
35K
21.75 mi13:47:012:31:216:585:14
7:00
#5126
23M
23.00 mi13:55:552:40:156:588:54
7:06
#5035
24M
24.00 mi14:03:022:47:226:587:07
7:07
#5004
40K
24.85 mi14:09:082:53:286:596:06
7:08
#4955
25.2M
25.20 mi14:11:482:56:086:592:40
7:44
#4940
Finish
26.22 mi14:18:533:03:137:007:05
6:57
#4883
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi5587514651465910(Top 22%)5387(Top 35%)5387(Top 102%)
10K6.21 mi3.10 mi5760-1735291-1455291-1455992(Top 23%)5455(Top 36%)5455(Top 103%)
15K9.32 mi3.11 mi5796-365318-275318-275910(Top 22%)5387(Top 35%)5387(Top 102%)
20K12.43 mi3.11 mi5735+615271+475271+475604(Top 21%)5146(Top 34%)5146(Top 97%)
Half13.11 mi0.68 mi5758-235291-205291-206155(Top 23%)5598(Top 37%)5598(Top 106%)
25K15.53 mi2.42 mi5623+1355175+1165175+1164968(Top 19%)4597(Top 30%)4597(Top 87%)
30K18.64 mi3.11 mi5414+2094996+1794996+1794686(Top 18%)4327(Top 29%)4327(Top 82%)
20M20.00 mi1.36 mi5288+1264882+1144882+1144417(Top 17%)4066(Top 27%)4066(Top 77%)
21M21.00 mi1.00 mi5144+1444749+1334749+1333718(Top 14%)3449(Top 23%)3449(Top 65%)
35K21.75 mi0.75 mi5126+184728+214728+215286(Top 20%)4714(Top 31%)4714(Top 89%)
23M23.00 mi1.25 mi5035+914640+884640+884349(Top 16%)3968(Top 26%)3968(Top 75%)
24M24.00 mi1.00 mi5004+314606+344606+345263(Top 20%)4608(Top 30%)4608(Top 87%)
40K24.85 mi0.85 mi4955+494565+414565+414532(Top 17%)4014(Top 26%)4014(Top 76%)
25.2M25.20 mi0.35 mi4940+154549+164549+164987(Top 19%)4264(Top 28%)4264(Top 81%)
Finish26.22 mi1.02 mi4883+574498+514498+514914(Top 18%)4211(Top 28%)4211(Top 80%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 22%
×21stories
+97ft-345ft

Overall

5910

Males

5387

M18-39

5387

5K→10K

3.1 - 6.2 mi

Top 23%
×5stories
+79ft-138ft

Overall

5992

Males

5455

M18-39

5455

10K→15K

6.2 - 9.3 mi

Top 22%
×3stories
+67ft-78ft

Overall

5910

Males

5387

M18-39

5387

15K→20K

9.3 - 12.4 mi

Top 21%
×5stories
+106ft-86ft

Overall

5604

Males

5146

M18-39

5146

20K→Half

12.4 - 13.1 mi

Top 23%
×2stories
+19ft-37ft

Overall

6155

Males

5598

M18-39

5598

Half→25K

13.1 - 15.5 mi

Top 19%
×4stories
+66ft-88ft

Overall

4968

Males

4597

M18-39

4597

25K→30K

15.5 - 18.6 mi

Top 18%
×9stories
+181ft-148ft

Overall

4686

Males

4327

M18-39

4327

30K→20M

18.6 - 20.0 mi

Top 17%
×5stories
+64ft-50ft

Overall

4417

Males

4066

M18-39

4066

20M→21M

20.0 - 21.0 mi

Top 14%
×8stories
+106ft-24ft

Overall

3718

Males

3449

M18-39

3449

21M→35K

21.0 - 21.8 mi

Top 20%
×7stories
+17ft-86ft

Overall

5286

Males

4714

M18-39

4714

35K→23M

21.8 - 23.0 mi

Top 16%
×5stories
+23ft-63ft

Overall

4349

Males

3968

M18-39

3968

23M→24M

23.0 - 24.0 mi

Top 20%
×6stories
+12ft-82ft

Overall

5263

Males

4608

M18-39

4608

24M→40K

24.0 - 24.9 mi

Top 17%
×1story
+6ft-20ft

Overall

4532

Males

4014

M18-39

4014

40K→25.2M

24.9 - 25.2 mi

Top 19%
×1story
+13ft-16ft

Overall

4987

Males

4264

M18-39

4264

25.2M→Finish

25.2 - 26.2 mi

Top 18%
×2stories
+22ft-21ft

Overall

4914

Males

4211

M18-39

4211

Passing Analysis

Category:
Athletes Passed
1432
Passed By
728
Net Change
+704
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#5587
5K → 10K130303-173#5587#5760
10K → 15K97133-36#5760#5796
15K → 20K12867+61#5796#5735
20K → Half932-23#5735#5758
Half → 25K15015+135#5758#5623
25K → 30K24940+209#5623#5414
30K → 20M1359+126#5414#5288
20M → 21M1495+144#5288#5144
21M → 35K4628+18#5144#5126
35K → 23M11322+91#5126#5035
23M → 24M6130+31#5035#5004
24M → 40K6516+49#5004#4955
40K → 25.2M2611+15#4955#4940
25.2M → Finish7417+57#4940#4883
TOTALS1432728+704
📊

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