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SF MARATHON 2026

Jack Costello

Bib: 756•M•Age: 28

Boulder, CO

0:00
0:00
/ mi
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Overall
#0 / 7166
Top 10%
Gender (Male)
#0 / 5052
Top 12%
Division (M25-29)
#0 / 1176
Top 14%
Race Day Weather
59°/49°F
scattered clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
2M
15:39
Rank: #620
Start → 2M
15:39 | 7:49/mi
4M
31:28
Rank: #611 (+9)
2M → 4M
15:49 | 7:55/mi
6M
47:10
Rank: #615 (-4)
4M → 6M
15:42 | 7:51/mi
8M
1:02:37
Rank: #602 (+13)
6M → 8M
15:27 | 7:43/mi
9.6M
1:15:49
Rank: #620 (-18)
8M → 9.6M
13:12 | 8:15/mi
10M
1:17:59
Rank: #609 (+11)
9.6M → 10M
2:10 | 5:25/mi
10.5M
1:23:10
Rank: #606 (+3)
10M → 10.5M
5:11 | 10:22/mi
12M
1:34:21
Rank: #592 (+14)
10.5M → 12M
11:11 | 7:27/mi
14M
1:51:19
Rank: #592
12M → 14M
16:58 | 8:29/mi
16M
2:04:02
Rank: #542 (+50)
14M → 16M
12:43 | 6:21/mi
18M
2:22:48
Rank: #624 (-82)
16M → 18M
18:46 | 9:23/mi
20M
2:40:27
Rank: #662 (-38)
18M → 20M
17:39 | 8:49/mi
22M
2:56:02
Rank: #668 (-6)
20M → 22M
15:35 | 7:47/mi
24M
3:15:28
Rank: #691 (-23)
22M → 24M
19:26 | 9:43/mi
Finish· 26.22 mi
3:35:39
Rank: #693 (-2)
24M → Finish
20:11 | 9:06/mi

The Course

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Half Splits

1st Half· via 14M
Distance14.00 mi
Time1:51:19
Pace7:57 /mi
2nd Half✓ Faster
Distance12.22 mi
Time1:44:20
Pace8:32 /mi
📊Negative Split: 6.3% faster second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
2M
2.00 mi05:31:4815:397:4915:39
7:49
-
4M
4.00 mi05:47:3731:287:5215:49
7:55
+0:06
6M
6.00 mi06:03:1947:107:5215:42
7:51
-0:04
8M
8.00 mi06:18:461:02:377:5015:27
7:43
-0:08
9.6M
9.60 mi06:31:581:15:497:5413:12
8:15
+0:32
10M
10.00 mi06:34:081:17:597:482:10
5:25
-2:50
10.5M
10.50 mi06:39:191:23:107:555:11
10:22
+4:57
12M
12.00 mi06:50:301:34:217:5211:11
7:27
-2:55
14M
14.00 mi07:07:281:51:197:5716:58
8:29
+1:02
16M
16.00 mi07:20:112:04:027:4512:43
6:21
-2:08
18M
18.00 mi07:38:572:22:487:5618:46
9:23
+3:02
20M
20.00 mi07:56:362:40:278:0117:39
8:49
-0:34
22M
22.00 mi08:12:112:56:028:0015:35
7:47
-1:02
24M
24.00 mi08:31:373:15:288:0919:26
9:43
+1:56
Finish
26.22 mi08:51:483:35:398:1420:11
9:06
-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

5:25 /mi

Average Pace

8:14 /mi

Slowest Pace

10:22 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

14:53

7% of race

Time at Steady Pace

1:59:33

55% of race

Time at Slower Pace

1:21:13

38% of race

Average Pace: 8:13 /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
2M
2.00 mi05:31:4815:397:4915:39
7:49
#620
4M
4.00 mi05:47:3731:287:5215:49
7:55
#611
6M
6.00 mi06:03:1947:107:5215:42
7:51
#615
8M
8.00 mi06:18:461:02:377:5015:27
7:43
#602
9.6M
9.60 mi06:31:581:15:497:5413:12
8:15
#620
10M
10.00 mi06:34:081:17:597:482:10
5:25
#609
10.5M
10.50 mi06:39:191:23:107:555:11
10:22
#606
12M
12.00 mi06:50:301:34:217:5211:11
7:27
#592
14M
14.00 mi07:07:281:51:197:5716:58
8:29
#592
16M
16.00 mi07:20:112:04:027:4512:43
6:21
#542
18M
18.00 mi07:38:572:22:487:5618:46
9:23
#624
20M
20.00 mi07:56:362:40:278:0117:39
8:49
#662
22M
22.00 mi08:12:112:56:028:0015:35
7:47
#668
24M
24.00 mi08:31:373:15:288:0919:26
9:43
#691
Finish
26.22 mi08:51:483:35:398:1420:11
9:06
#693
Faster pace
Steady pace
Slower pace
Garmin Challenge
Featured Segment

Garmin Challenge

The climb, presented by Garmin

Top 8%
Garmin Challenge
Course map with the garmin challenge highlighted
Garmin Challenge · 9.6–10.5 mi · © Mapbox © OpenStreetMap

7:21

Segment Time

8:10/mi

Pace

0.90 mi

Distance

Overall

608

Men

555

Division

143

See the full Garmin Challenge leaderboard

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM25-29Seg. OverallSeg. MalesSeg. M25-29
2M2.00 mi2.00 mi620558132613(Top 9%)560(Top 11%)155(Top 13%)
4M4.00 mi2.00 mi611+9551+7138-6636(Top 9%)570(Top 11%)141(Top 12%)
6M6.00 mi2.00 mi615-4554-3136+2646(Top 9%)582(Top 12%)139(Top 12%)
8M8.00 mi2.00 mi602+13546+8135+1617(Top 9%)553(Top 11%)139(Top 12%)
9.6M9.60 mi1.60 mi620-18560-14135704(Top 10%)630(Top 12%)162(Top 14%)
10M10.00 mi0.40 mi609+11551+9136-1607(Top 8%)554(Top 11%)149(Top 13%)
10.5M10.50 mi0.50 mi606+3549+2133+3681(Top 10%)613(Top 12%)150(Top 13%)
12M12.00 mi1.50 mi592+14535+14134-1613(Top 9%)560(Top 11%)155(Top 13%)
14M14.00 mi2.00 mi592535133+1691(Top 10%)623(Top 12%)163(Top 14%)
16M16.00 mi2.00 mi542+50492+43126+7407(Top 6%)370(Top 7%)98(Top 8%)
18M18.00 mi2.00 mi624-82562-70143-171574(Top 22%)1326(Top 26%)346(Top 29%)
20M20.00 mi2.00 mi662-38595-33157-141189(Top 17%)1008(Top 20%)270(Top 23%)
22M22.00 mi2.00 mi668-6598-3161-4669(Top 9%)578(Top 11%)167(Top 14%)
24M24.00 mi2.00 mi691-23616-18168-71451(Top 20%)1166(Top 23%)296(Top 25%)
Finish26.22 mi2.22 mi693-2613+3169-11206(Top 17%)971(Top 19%)263(Top 22%)

Segment Performance Analysis

10.5M→12M

0.0 - 2.0 mi

Top 9%
×1human
+6ft-11ft

Overall

613

Males

560

M25-29

155

2M→4M

2.0 - 4.0 mi

Top 9%
×4stories
+75ft-70ft

Overall

636

Males

570

M25-29

143

4M→6M

4.0 - 6.0 mi

Top 9%
×5stories
+71ft-18ft

Overall

646

Males

582

M25-29

141

6M→8M

6.0 - 8.0 mi

Top 9%
×9stories
+106ft-21ft

Overall

617

Males

553

M25-29

140

8M→9.6M

8.0 - 9.6 mi

Top 10%
×13stories
+117ft-177ft

Overall

704

Males

630

M25-29

162

9.6M→10M

9.6 - 10.0 mi

Top 8%
×1story
+17ft-12ft

Overall

607

Males

554

M25-29

151

10M→10.5M

10.0 - 10.5 mi

Top 10%
×9stories
+0ft-102ft

Overall

681

Males

613

M25-29

151

10.5M→12M

10.5 - 12.0 mi

Top 9%
×18stories
+304ft-125ft

Overall

613

Males

560

M25-29

155

12M→14M

12.0 - 14.0 mi

Top 10%
×9stories
+99ft-125ft

Overall

691

Males

623

M25-29

163

14M→16M

14.0 - 16.0 mi

Top 6%
×9stories
+124ft-78ft

Overall

407

Males

370

M25-29

98

16M→18M

16.0 - 18.0 mi

Top 22%
×8stories
+106ft-45ft

Overall

1574

Males

1326

M25-29

347

18M→20M

18.0 - 20.0 mi

Top 17%
×3stories
+52ft-26ft

Overall

1189

Males

1008

M25-29

270

20M→22M

20.0 - 22.0 mi

Top 9%
×21stories
+17ft-266ft

Overall

669

Males

578

M25-29

167

22M→24M

22.0 - 24.0 mi

Top 20%
×3stories
+70ft-85ft

Overall

1451

Males

1166

M25-29

296

24M→Finish

24.0 - 26.2 mi

Top 17%
~flat
+2ft-2ft

Overall

1206

Males

971

M25-29

263

Passing Analysis

Category:
Athletes Passed
277*
Passed By
350
Net Change
-73
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 2M----#620
2M → 4M3526+9#620#611
4M → 6M1923-4#611#615
6M → 8M25*12+13#615#602
8M → 9.6M523-18#602#620
9.6M → 10M132+11#620#609
10M → 10.5M1310+3#609#606
10.5M → 12M195+14#606#592
12M → 14M14*140#592#592
14M → 16M6010+50#592#542
16M → 18M789-82#542#624
18M → 20M9*47-38#624#662
20M → 22M20*26-6#662#668
22M → 24M1740-23#668#691
24M → Finish21*23-2#691#693
TOTALS277*350-73

* Includes athletes who did not complete a segment (DNF/DNQ).

📊

Passing Visuals

Category:

📈Position Graph

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🎨Heatmap Timeline

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🔄Passing Circle

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🌊Position Flow

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🏃Race Lanes

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