Boston Marathon logo
BOSTON MARATHON 2023

Jonathan Haadsma

Bib: 1824•M

MI

0:00
0:00
/ mi
Be the first to cheer!
Overall
#0 / 26622
Top 5%
Gender (Male)
#0 / 15176
Top 8%
Division (M18-39)
#0 / 5285
Top 18%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
19:47
Rank: #1673
Start → 5K
19:47 | 6:22/mi
10K· 6.21 mi
39:10
Rank: #1581 (+92)
5K → 10K
19:23 | 6:14/mi
15K· 9.32 mi
58:43
Rank: #1579 (+2)
10K → 15K
19:33 | 6:18/mi
20K· 12.43 mi
1:18:20
Rank: #1542 (+37)
15K → 20K
19:37 | 6:19/mi
Half· 13.11 mi
1:22:34
Rank: #1531 (+11)
20K → Half
4:14 | 6:12/mi
25K· 15.53 mi
1:37:47
Rank: #1454 (+77)
Half → 25K
15:13 | 6:17/mi
30K· 18.64 mi
1:57:40
Rank: #1383 (+71)
25K → 30K
19:53 | 6:24/mi
20M
2:06:23
Rank: #1367 (+16)
30K → 20M
8:43 | 6:25/mi
21M
2:13:01
Rank: #1325 (+42)
20M → 21M
6:38 | 6:38/mi
35K· 21.75 mi
2:17:39
Rank: #1310 (+15)
21M → 35K
4:38 | 6:12/mi
23M
2:25:40
Rank: #1269 (+41)
35K → 23M
8:01 | 6:24/mi
24M
2:32:02
Rank: #1265 (+4)
23M → 24M
6:22 | 6:22/mi
40K· 24.85 mi
2:37:32
Rank: #1249 (+16)
24M → 40K
5:30 | 6:26/mi
25.2M
2:39:52
Rank: #1242 (+7)
40K → 25.2M
2:20 | 6:46/mi
Finish· 26.22 mi
2:46:08
Rank: #1220 (+22)
25.2M → Finish
6:16 | 6:09/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
Time1:22:34
Pace6:18 /mi
2nd Half
Distance13.11 mi
Time1:23:34
Pace6:22 /mi
📊Positive Split: 1.2% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:20:2619:476:2219:47
6:22
-
10K
6.21 mi10:39:4939:106:1819:23
6:14
-0:08
15K
9.32 mi10:59:2258:436:1819:33
6:18
+0:04
20K
12.43 mi11:18:591:18:206:1819:37
6:19
+0:01
Half
13.11 mi11:23:131:22:346:184:14
6:12
-0:07
25K
15.53 mi11:38:261:37:476:1815:13
6:17
+0:05
30K
18.64 mi11:58:191:57:406:1919:53
6:24
+0:07
20M
20.00 mi12:07:022:06:236:198:43
6:25
+0:01
21M
21.00 mi12:13:402:13:016:206:38
6:38
+0:13
35K
21.75 mi12:18:182:17:396:204:38
6:12
-0:26
23M
23.00 mi12:26:192:25:406:208:01
6:24
+0:12
24M
24.00 mi12:32:412:32:026:206:22
6:22
-0:02
40K
24.85 mi12:38:112:37:326:205:30
6:26
+0:04
25.2M
25.20 mi12:40:312:39:526:212:20
6:46
+0:20
Finish
26.22 mi12:46:472:46:086:206:16
6:09
-0:37

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

6:09 /mi

Average Pace

6:20 /mi

Slowest Pace

6:46 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:43:48

99% of race

Time at Steady Pace

2:20

1% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 6:20 /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 mi10:20:2619:476:2219:47
6:22
#1673
10K
6.21 mi10:39:4939:106:1819:23
6:14
#1581
15K
9.32 mi10:59:2258:436:1819:33
6:18
#1579
20K
12.43 mi11:18:591:18:206:1819:37
6:19
#1542
Half
13.11 mi11:23:131:22:346:184:14
6:12
#1531
25K
15.53 mi11:38:261:37:476:1815:13
6:17
#1454
30K
18.64 mi11:58:191:57:406:1919:53
6:24
#1383
20M
20.00 mi12:07:022:06:236:198:43
6:25
#1367
21M
21.00 mi12:13:402:13:016:206:38
6:38
#1325
35K
21.75 mi12:18:182:17:396:204:38
6:12
#1310
23M
23.00 mi12:26:192:25:406:208:01
6:24
#1269
24M
24.00 mi12:32:412:32:026:206:22
6:22
#1265
40K
24.85 mi12:38:112:37:326:205:30
6:26
#1249
25.2M
25.20 mi12:40:312:39:526:212:20
6:46
#1242
Finish
26.22 mi12:46:472:46:086:206:16
6:09
#1220
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi1673159415941615(Top 6%)1542(Top 10%)1542(Top 29%)
10K6.21 mi3.10 mi1581+921509+851509+851499(Top 6%)1432(Top 9%)1432(Top 27%)
15K9.32 mi3.11 mi1579+21508+11508+11615(Top 6%)1542(Top 10%)1542(Top 29%)
20K12.43 mi3.11 mi1542+371473+351473+351439(Top 5%)1374(Top 9%)1374(Top 26%)
Half13.11 mi0.68 mi1531+111462+111462+111372(Top 5%)1312(Top 9%)1312(Top 25%)
25K15.53 mi2.42 mi1454+771388+741388+741243(Top 5%)1187(Top 8%)1187(Top 22%)
30K18.64 mi3.11 mi1383+711321+671321+671206(Top 5%)1150(Top 8%)1150(Top 22%)
20M20.00 mi1.36 mi1367+161306+151306+151179(Top 4%)1123(Top 7%)1123(Top 21%)
21M21.00 mi1.00 mi1325+421264+421264+42939(Top 4%)891(Top 6%)891(Top 17%)
35K21.75 mi0.75 mi1310+151251+131251+131216(Top 5%)1159(Top 8%)1159(Top 22%)
23M23.00 mi1.25 mi1269+411212+391212+391110(Top 4%)1050(Top 7%)1050(Top 20%)
24M24.00 mi1.00 mi1265+41208+41208+41554(Top 6%)1470(Top 10%)1470(Top 28%)
40K24.85 mi0.85 mi1249+161192+161192+161305(Top 5%)1232(Top 8%)1232(Top 23%)
25.2M25.20 mi0.35 mi1242+71184+81184+81054(Top 4%)1001(Top 7%)1001(Top 19%)
Finish26.22 mi1.02 mi1220+221163+211163+211129(Top 4%)1075(Top 7%)1075(Top 20%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 6%
×21stories
+97ft-345ft

Overall

1615

Males

1542

M18-39

1542

5K→10K

3.1 - 6.2 mi

Top 6%
×5stories
+79ft-138ft

Overall

1499

Males

1432

M18-39

1432

10K→15K

6.2 - 9.3 mi

Top 6%
×3stories
+67ft-78ft

Overall

1615

Males

1542

M18-39

1542

15K→20K

9.3 - 12.4 mi

Top 5%
×5stories
+106ft-86ft

Overall

1439

Males

1374

M18-39

1374

20K→Half

12.4 - 13.1 mi

Top 5%
×2stories
+19ft-37ft

Overall

1372

Males

1312

M18-39

1312

Half→25K

13.1 - 15.5 mi

Top 5%
×4stories
+66ft-88ft

Overall

1243

Males

1187

M18-39

1187

25K→30K

15.5 - 18.6 mi

Top 5%
×9stories
+181ft-148ft

Overall

1206

Males

1150

M18-39

1150

30K→20M

18.6 - 20.0 mi

Top 4%
×5stories
+64ft-50ft

Overall

1179

Males

1123

M18-39

1123

20M→21M

20.0 - 21.0 mi

Top 4%
×8stories
+106ft-24ft

Overall

939

Males

891

M18-39

891

21M→35K

21.0 - 21.8 mi

Top 5%
×7stories
+17ft-86ft

Overall

1216

Males

1159

M18-39

1159

35K→23M

21.8 - 23.0 mi

Top 4%
×5stories
+23ft-63ft

Overall

1110

Males

1050

M18-39

1050

23M→24M

23.0 - 24.0 mi

Top 6%
×6stories
+12ft-82ft

Overall

1554

Males

1470

M18-39

1470

24M→40K

24.0 - 24.9 mi

Top 5%
×1story
+6ft-20ft

Overall

1305

Males

1232

M18-39

1232

40K→25.2M

24.9 - 25.2 mi

Top 4%
×1story
+13ft-16ft

Overall

1054

Males

1001

M18-39

1001

25.2M→Finish

25.2 - 26.2 mi

Top 4%
×2stories
+22ft-21ft

Overall

1129

Males

1075

M18-39

1075

Passing Analysis

Category:
Athletes Passed
674
Passed By
221
Net Change
+453
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#1673
5K → 10K13745+92#1673#1581
10K → 15K5351+2#1581#1579
15K → 20K6124+37#1579#1542
20K → Half165+11#1542#1531
Half → 25K8912+77#1531#1454
25K → 30K8716+71#1454#1383
30K → 20M2913+16#1383#1367
20M → 21M453+42#1367#1325
21M → 35K227+15#1325#1310
35K → 23M465+41#1310#1269
23M → 24M2319+4#1269#1265
24M → 40K248+16#1265#1249
40K → 25.2M125+7#1249#1242
25.2M → Finish308+22#1242#1220
TOTALS674221+453
📊

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